Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 109

**maths**

3 and 5 of spade, king and queen of club , 7 and 9 of diamond and ace of heart are removed (i) find the probability its a red card (ii) find the probability its neither king nor queen (iii) find the probability its a face card (iv) That its a black coloured card (v) that its a...

**maths**

Some cards are numbered from 1 to 30. They are reshuffled and arranged. Find the probability that it will be an odd number

**maths**

A plane has to crash on the field which is 2km by 1.5km . There is a lake in the corner whose dimensions are 900m by 300 m (i) what is the probability that the plane will crash in the lake (ii) what is the probability that will crash other than lake.

**maths**

factorise ? a(a+b)^2 - 2ab(a+b)

**maths**

Simplify 3*3 to the power root 40 - 4* 3 to the power root 320 - 5 to the power root 5?

**physics**

a balloon is rising up with an acceleration of 25meter per second a body is dropped from the balloon when its upward velocity is 300meter per second. what are there values of velocity and acceleration of the body at the instant it is dropped?

**physics**

on turning a corner a motorcyclist rushing at 44 meter per second. find a child on the road 100m away. he applies the brake so as to stop motorcycle within 1m of the child. calculate the time required to stop?

**physics**

a balloon is rising up with acceleration of 25m per hour second square a body is dropped from the balloon when its upward velocity is 300m/s what are the values of velocity and the acceleration of the body at the instant it is dropped ?

**physics**

on turning a corner a motorcyclist rushing at 44 m/s. finds a child on the road 100 m away. he applies the brake so as he stops the motorcycle within 1m of the child. calculate the time required to stop?

**maths**

if a/b+b/a = 1,then a^3+b^3 =????????????????????

**maths**

if a/b+b/a= -1,then a^3-b^3 = ????????

**maths**

what is pure surd of 3/4root32?

**maths**

express -108a^4b^3 whole cube root in the simplest form?

**maths**

express a^8b^6c^7 whole root 4 in the simplest form??

**maths**

If a= 3 +2 root 2 , then find the value of a^2 - 1/a^2 ????

**maths**

if a=3+2root2 then find the value of a square- 1by a square?

**maths**

if 3^x = 5^y = 75^z show that z= xy/2x +y

**maths**

if x=2^1/3 + 2^2/3 show that x^3-6x =6

**maths**

prove that: 1/1+x^b-a + x^c-a + 1/1+x^a-b +x^a-c = 1

**maths**

prove that : 3^-3 * 6^2 * root 98 divided by 5 ^2 * cube root 1/25 * 15 ^-4/3 * 3^1/3 equals to 28 root 2

**maths**

prove that : 3^-3 * 6^2 * root 98 / 5^2 * cube root 1/25 * 15^-4/3 *3^1/3 is equal to 28 root 2

**maths**

prove that : 3^-3 * 6^2 * root 98 / 5^2 cube root 1/25 *(15)^-4/3 *3^1/3

**maths**

prove that : 2^n + 2^n-1 / 2^n+1 - 2^n = 3/2

**maths**

root over 3+2*root2 value is ????

**math**

Sqaure root 3-2root2??

**maths**

What is the value of whole root 3+2 root 2 equals to ????

**maths**

Positive square root of 7+root 48 is ????

**maths**

13-a*root 10 whole root = root 8 + root 5 then a equals to ???

**maths**

Simplify 3-2*root2 of whole root ??

**maths**

how to calculate 36^6/7 ???

**math**

If x=12 and y=14 .Find the value of (x+y)^x/y ????

**maths**

7z-2[3(x-2y)-4{2z-(2y-3y-3x-5z)}]

**maths **

on selling a bag for rs.704, a shopkeeper suffers a loss of 12% at what price should he sell it to gain 7.5%

**maths**

if Arvind cycles 10km/hr ,he reaches the school late by 4min,/if he cycles 12km/hr,he reaches the school early by 2min,find the distance of the school from his home.

**maths **

the perimeter of a rectangle is 340 cm.if its length is decreased by 10% and breadth is decreased by 20% .we get the same perimeter.find the length and breadth of the rectangle.

**maths**

factorise 15a^2b^2-20ab+8

**maths**

if 8 labourers can earn rs.9000 in 15 days.how many laboures can earn rs. 6300 in 7 days?

**maths**

in an election .there were only two candidates. the winner was polled 53% votes and won by 9600 votes. find the total no. of votes polled.

**maths**

if x and y vary inversely and x=18 when y=8,find x when y=16

**math**

A metalic sheet of rectangular shape with 48m*36m from each of it corner a square is cut off so as to make an open box. if length of each square length is 8m find the volume of the open box ????

**maths**

Divide rs 13.26 between A,B and C , so that B's share is twice the share of A and A's share is 1/3 of C's share?????

**maths**

I bought a certain number of apples at 4 for 6 paise and 3/5 of that number at 3 for 6 paise by selling them at 16 for rs.30p. I gained 24 paise.. How many apples did I buy????

**maths**

A man's age is 4 times the combined age of a two sons. One of whom is 3 times as old as the other. In 24 years their combined ages will be 12 year less than their father's age . Find their respective age ????

**maths**

A sum of rs76.50 was pain in 50,25 and 10 paise coins. The number of 10p coin used was four times a number of 25p coin and 10 times of 50p coins how many were there of each ?????

**maths**

The price of 13m cloth is as much less than rs.50 as the price of 27m exceeds rs.29. Find the price per meter?????

**maths**

DIVIDE X^6 - 7X^3 - 8 BY THE PRODUCT OF X+1 AND (X^2 + 4) ???????

**maths**

DIVIDE X^6 -7^3 -8 BY THE PRODUCT OF X+1 AND ( X^2 +4) ?????

**maths**

factorize -> 3a^2 +6a^2 x^2 - 3a^3 x ????

**maths**

the difference between the two selling prices of a shirt at profits of 4% and 5% is rs, 6.find the c.p. of the shirt and 2 s.p. of the shirts?

**maths**

vinit sold a watch to alex at a gain of 12%and alex sold it to Priya at a loss of 5%. if Priya paid rs.1330 for it,how much vinit pay for the watch?

**MATHS**

A cylindrical water tank of diameter 1.4m and height 2.1m is being feed by a pipe of diameter 3.5cm through which water follows at the rate of 2m/per second . In how much time the tank will be filled ???

**maths**

The area of 3 adjacent faces of cuboid are x,y and z . If the volume is V , Prove that V^2 = xyz ???

**maths**

A cylindrical vessel without a lid is made from a sheet of metal . Find the area of the metal required if the length of the vessel is 35cm and its diameter is 28cm ????

**maths**

a cube of edge 10cm is completly inversed in a rectangular trough truck with height 40cm breadth 25cm containing water to a height of 30cm . what will be the height after the immersion of the cube ????

**maths**

A Cuboid dimension 14cm*8cm*7cm is completely emerged in cuboid trough with side 28cm containing water 20 cm.what will be the height of water after emerging?

**math**

by selling 90 computer a shopkeeper gains the amount which is equal to the selling price of 10 computer find the profit percent ? had he purchased them for rupees 30000 each what would have been the selling price of a computer ??

**math**

a fruit seller buys 100kg apple at the rate of rs 20 per /kg . He sold 40 kg at a loss of 7%.At what price should we sell the remaining apple to make a profit of 15% on the whole transaction ??

**math**

the value of a piece of land is increased by 20 percent if now it worth 15 lac ,what is the originalprice of the land

**math**

by selling an article for rs.1200 the shopkeeper lost 10 percent .at what price he have sold it to gain 10percent.

**math**

maria bought two fans for rs.3605 .she sold one at the profit of 15% and the other at a loss of 9%. if maria got the same amount for each fan ,find the cost price of each fan ??

**math**

maria bought two fans for rs. 3605. she sold one at the profit of 15% and the other at the loss of 9%. if maria got same amount for each fan ,find the cost price of each fan ??

**math**

prove that a^2+b^2+c^2-ab-bc-ca is always non negative for all the value of a' b and c

**math**

if a+b=10 and ab=16.find the value of a^2-ab+b^2 and a^2+ab+b^2

**math**

the distance between two stations is 300km. two trains start simultaneously from these stations and move towards each other ,the speed of one them is 7k/hr more than the other . if the distance between them after 2hours of their start is 34km ,find the speed of each train ????

**math**

an altitude of triangle is 5/3rd of the length of its corresponding base if their altitude be increased by 4cm and the base is decreased by 2cm, the area of the triangles remain the same. find the base and altitude of triangle ?????

**math**

the age of somya and yaseen are in the ratio 5:7.if somya were 9 years older and yaseen is 9 years younger one,find thier present age?

**math**

Sanjeev is twice as old as his son.If after four years he will be four times as old as his son was 9 years ago ,how old is each now ??

**math**

Sanjeev is twice as old as his son.If after four years he will be four times as old as his son was 9 years ago ,how old is each now ??

**math**

x^2 + 1/x^2 = 47. find the value of x+ 1/x and x- 1/x

**math**

if x^4 + 1/x^4 =42 .find x+1/x

**math**

what must be added to each of the following expressions to make it a whole square (i) 4x^2 - 12x + 7 (ii) 4x^2 - 20x + 20

**math**

if x-2 is a factor of polynomial x cube - 2ax square + ax - 1 what is the value of a ??

**math**

in an examination there are 180 questions , 4 marks is given for each correct answers and 1 marks is subtracted for each wrong answers . if a boy scores 220 marks find the no of correct and wrong answers ???

**math**

two coins are thrown at random .what is the probability of getting a a head and tails in three pros ??

**math**

three coins are tossed simultaneously ,what is the is the possible outcome of getting two head one tail ???

**math**

when a dice is thrown randomly .What is the probability of getting 5 ??

**math**

Two friends decide to cycle to a picnic spot the first person cycles 5 and a 1/2 km/hour and 2nd cycles 6 and a3/4 km/hour to make up for being slow the first person starts out two and half hour earlier after how much time and distance will the 2nd person catch up with the fir...

**math**

A mother is 4 times as old as her son and 5 times as old as her daughter .When the son is three times as old as he is now, the mother's age will be 3 year's more than twice the daughter's age then what are there current ages??

**math**

two numbers differ by 11 and 1/3rd of the greater exceeds 1/4th of the other by 7 . find the number ???

**math**

a an sold a bicycle for an amount which was greater by rs. 988 than half price he paid for it an made a profit of rs. 300 how much did he sell the bicycle for???

**math**

Mr. Jain is 3 year older than Mrs. Jain .One fifth of Mr Jain's age is 3 year's more than 1/8 of Mrs. Jain's age how old ARE Mr. and Mrs. Jain ???????????

**science ( biology)**

What are the various method a farmer should do to increase his land fertility by spending less money ???

**math**

.009/.004=root over.027/.008 -1 ?

**math**

A no consists of 2 digits whose product is 18 when 27 is subtracted from the no the digit inter change find the number

**math**

A square whose side is 2m has it's corner cut away so as to form a octagon with all sides equal find the length of each side of octagon and also find the area of the octagon?

**math**

What will be the perimeter of a rectangle it's length is 3 times it's breadth and he root of the diagonal is 8* root over 10cm ?????

**math**

if 27 to the power k is equal to 9 divided by 3 to the power k.find the value of 1 by k to the power 2

**math**

the middle digit of a no between 100 and 1000 is 0 the sum of the other digit is 11. if the digit be reversed the no so formed exeed the original no by 475 find the no..

**math**

Show that ( a1/3 - b1/3) ( a2/3 +a1/3 * b1/3 + b2/3 )?

**physics**

how can we see image of an object? explain the mechanism?

**physics**

how presence of two eyes help in binocular vision in our daily tasks?

**math**

ajay gets 20 percent less marks than that of vatsals marks. by what percentsvatsals marks is more than Ajays marks

**math**

Mala buys x pens for rs.20 if x=4,what is the cost of each pen?

**math**

two third of4x-1 - (4x-1-1-3x/2=x-7/2

**math**

The distance between Delhi and Meerut is 75km . Two trains at a speed of 100km/hr and 80km/hr leave the two stations at 8am towards each other. At what time they will pass each other?

**math**

Prove that , if the difference between a three digit number in the form of a0b that is digit at ten's place is 0 and the sum of it's digits is divided by 99, we always get the number equal to a?

**math**

2/3(4x - 1) - (4x- 1-3x/2)= x-7/2. Find the value of x ?

**math**

Divide rs.500 between rita and seema such that 1/3 share of rita and 1/2 share of seema are equal?

**math**

find the value of a and b , so that 10x to the power 4 + 17x to the power 3 - 62x to the power 2 + 24x -bx -5 +a,is divisible by 2x to the power 2 + 7x - 1 ?

**math**

16 to power 1/4 divided by 16 to the power 1/2 ?