mahesh
Most popular questions and responses by mahesh
friction
A 40 kg slab rests on a friction less floor.a 10 kg block rests on top of the slab.the coefficient kinetic friction between the block and the slab is 0.40.a horizontal force of 100N is applied on the 10 kg block.find the resulting acceleration of the slab.
asked on September 28, 2014 
maths
a train of length 100m runs at a speed of 120km/hr from north to south. another train of length 150m travels with a speed of 80 km/hr from south to north. what is the time required to cross each other ?
asked on May 29, 2017 
maths
Prove that max & min values of asinx+bcosx are = +/ (a^2+b^2)^1/2
asked on July 12, 2013 
math
A man spend 1/3 of his income on food, of the rest 1/4 on bills and 1/5 on miscellaneous things. Finally he left with Rs.1760. Find his income? a)4200 b)4600 c)4800) d)5200
asked on July 31, 2015 
maths
A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves the same station traveling in the same direction at 52 km/h. How long does it takes the passenger train to catch up to the freight train?
asked on May 31, 2017 
math
Find the orthogonal trajectories of family of the circle x2+y2=a2 where a is a parameter
asked on July 12, 2016 
Chemistry
Calculate the entropy change accompanying conversion of 1 mole of ice at 273 K and 1 atm pressure into steam at 373 K and 1 atm pressure, given that at 273 K, the molar heat of fusion of ice is 6 kJ/mol and at 373 K, the molar heat of vapourization of
asked on February 26, 2016 
math
. A boat is travelling on a bearing of 25° east of north at a speed of 5 knots (a knot is 1.852 km/h). After travelling for 3 hours, the boat heading is changed to 180° and it travels for a further 2 hours at 5 knots. What is the boat’s bearing from
asked on October 18, 2011 
maths
Find max and min values of y=sinx sin2x
asked on July 11, 2013 
maths
which of the following fraction is greater than 3/4 and less than 5/6. 1/2 , 2/3 ,4/5 , 9/10.
asked on May 9, 2017 
maths
the value of K+L/KL , if K/L = 7 ?
asked on May 9, 2017 
vskd
Maths If one third of the bucket can be filled in 3 min,how many min it take to fill whole bucket
asked on October 22, 2015

maths
sum of the four angles =(42) sum of the two angle =360130=230 so, second angle = 180/2=65 degree second angle = 210/2=115 degree
posted on July 27, 2018 
math
1. B. 3/7 = 3*6/7*6 = 18/42. 2. D.18/30 = 6/10 = 6*10/10*10 =60/100
posted on May 31, 2017 
English
PAPER
posted on March 13, 2016 
English
SSC PRE FINAL PAPERS
posted on March 13, 2016 
algebra
Sorry. I wanted it to be (16x)^33x6x(16x)
posted on July 17, 2013 
math
1hr10min=1+10/60=1+1/6=7/6hr Distance=48x7/6=56miles
posted on July 17, 2013 
math.
Distance covered in 4 hrs=4y Return distance=2x4y=8y and speed=5y Hence time of return trip=8y/5y=1.6hr Halt=1hr Total time=4+1+1.6=6.6hrs
posted on July 17, 2013 
math
Relative velocity=45+55=100mph Time taken to cover the total distance=150/100=1.5 hr i.e. 1hr 30min Meeting time is 2:15+1:30=3:45pm
posted on July 17, 2013 
math
Total money=x. Spent in I store=(x/2)+20 Remaining amt=x[(x/2)+20]=(x/2)20 Spent in II store=1/2[(x/2)20]+20 =(x/4)+10 Total expenditure is x x=(x/2)+20+(x/4)+10 Or x=(3x/4)+30 Or x3x/4=30 x/4=30 or x=120. Check: Spent in I store =60+20=80.
posted on July 17, 2013 
algebra
Please read second expression as 3(8x^2+14x+5)
posted on July 17, 2013 
algebra
24x^2+42x+15=3(8x^2+14+5) =3(8x^2+10x+4x+5) 3[2x(4x+5)+1(4x+5)] =3(4x+5)(2x+1)
posted on July 17, 2013 
algebra
(300)^1/2 /6^1/2=(300/6)^1/2 =50^1/2=7.07
posted on July 17, 2013 
math
(16)^2/3= 1/(16)^2/3=1/(16^2)^1/3 =1/256^1/3=1/6.35=0.157
posted on July 17, 2013 
math
In 1.75 hrs it fills 100% In 1 hr it will fill 100/1.75=57.14%
posted on July 17, 2013 
math
Time for going upwqards=7/2=3.5 hrs Time for coming back=7/3.5=2 hrs Total 3.5+2=5.5 i.e. 5 1/2 hrs
posted on July 17, 2013 
algebra
216x^3+1=1^3(6x)^3 =(1x)^33x(1x)
posted on July 17, 2013 
Math Ratios
Force is inversely proportional to square of distance between bodies, hence F/3.75x10^5=18^2/52^2 F=(18^2x3.75x10^5)/52^2 =0.46x10^5 dynes
posted on July 16, 2013 
Math
PS: s=11.47 which has appeared as 121.47 at one place in 4th line.
posted on July 16, 2013 
Math
v=ugt or 0=159.81t since final velocity is 0 and ball is going against gravity. Thus t=1.53 sec. s=ut.5gt^2=15.5x9.81x(1.53)^2 s=22.9511.48=121.47 which is the height the ball will go. From there it falls freely for a height of 11.47+1=12.47 ft.
posted on July 16, 2013 
algebra
No. of $5=bills a, $10 bill=b and $20 bill=c Then a+b+c=35 5a+10b+20c=370, and b+c=a+7. Substituting value of b+c in first eq., a+(a+7)=35 or 2a=28 or a=14 and b+c=3514=21. Substituting value of a in second eq., 14x5+10b+20c=370 or 10b+20c=37070 Or
posted on July 16, 2013 
math
If house costs x and lot costs y then x+y=86000, and x=6y+2000 or x6y=2000. Subtracting second eq. from first we get 6y+y=860002000 or 7y=84000 or y=12000. Thus lot costs $12000 House costs 8600012000=$74000.
posted on July 16, 2013 
MATH
If cos^1x=A then cosA=x and if (cosx)^1=A then A=1/cosx
posted on July 16, 2013 
math
PS: There is slight typo. Please readt first line as 'Kath is' and third line as 2x+10.
posted on July 16, 2013 
math
If the number is x, then 3x8 is=or greater than 2x. Agnus has x bones and Ignatz has x+5. Then x+x+5=27 or 2x=275=22 Or x=11. Ignatz has 11+5=16. Kathy mis x and John is x+10 Then x+x+10 is greater than 60 Or 2x+10is greater than 60 Or 2x 10 is greater
posted on July 16, 2013 
algebra
9.95x+11.5y=305.05 x+y=29 9.95x+9.95y=29*9.95 Or (11.509.95)y=305.05288.55 1.55y=16.5 y=16.5/1.55=10.6, say 11 yellow shirts 2911=18 white shirts 11*11.5+18*9.95=305.6 OK.
posted on July 15, 2013 
algebra
Lemon juice=x Oil=2x x+2x=3x=36
posted on July 15, 2013 
maths
If one train has a velocity of V km/h, the other one will have velocity V+5 km/h approaching the first train. Therefore Relative velocity will be V+V+5=2V+5 km/h. Distance travelled by them in 2 hrs is 34030=310km which is =2(2V+5) Thus 4V+10=310 or
posted on July 15, 2013 
physics
v=u+ft or 30=10+2t t=(3020)/2=10 secs.
posted on July 15, 2013 
math
Let it be x yrs ago, when Lisa was 15x and her father was 40x. Then 40x=6(15x) or 40x=906x Or 6xx=9040 or 5x=50 thus x=5. Let Bob be x yrs and Joel be 3x. Then (x+7)+(3x+7)=58 or 4x+14=85 Or 4x=44 hence x=11. Thus Bob is 11 and Joel is 33. After 7
posted on July 15, 2013 
Algebra
Yes please. 10 cubed is 1000 and cuberoot of q^36=q^(36/3)=q^12
posted on July 15, 2013 
math
Let present age of Kristen be x and of Daniel be y.Then after 1 year, x+1=4(y+1)or x4y=3.....Eq.1 After 10 yrs from then, ages will be (x+1)+10=2[(y+1)+10] Or x+11=2y+22 Or x2y=11 .....Eq.2. Subtract eq. 1 from eq.2 and solve. We get y=4 and x=19. Check:
posted on July 15, 2013 
math
Let the integers be x and x/4.Then x/4+12=x3 or x+48=4x12 by multiplying both sides by 4. Or 3x=2048 or x=20 which is the larger integer. Smaller one is then 20/4=5. Check:5+12=17=203 OK.
posted on July 15, 2013 
physics
v=u+at or 220/4=200/2+a*1 55=50+a or a=5m/s^2 Again, v=55+5*1=60m/sec at the start of 7th second.
posted on July 15, 2013 
algebra
Please see your third line: It should be 4y3y=205 or y=15, by subtracting first equation from second. Now x+3*15=5 Or x=545=40. Check:40+4*15=20 by putting values in second equation. This 40=1560=40 OK.
posted on July 15, 2013 
physics
Components of a force P due NorthWest acting at an angle A from North will be PcosA and PsinA in North and West directions respectively and should be equal in magnitude to the force acting on the object. Thus PcosA=83.4 and PsinA=47.2. Therefore
posted on July 12, 2013 
physics
Heat released by 0.5 kg silver=heat gained by 1 kg water upto final temp T. Or 0.5(2.4x100)(150T)=1(4.18x1000)(T5) Or 1.2(150T)=41.8(T5) Or 1801.2T=41.8T209 Or 43T=389 Or T=9.05 deg Celsius
posted on July 12, 2013 
Physics
t^2=2x3.14x0.47/a Or, a=6.28x0.47/1.43^2=0.43 m/sec^2
posted on July 12, 2013 
Geometry
Square has all sides equal hence 2x5=x+8 or 2xx=8+5 (by subtracting x and adding 5 on both sides) Thus x=13 inches. Check: 2x135=8+13 or 265=21.
posted on July 12, 2013 
physics
Weight is mass m times acceleration due to gravity g, which is given by g=GMm/R^2 where M and R are mass & radius of Earth and G is Universal Gravitational Constant. For new planet, g`=G(0.1Mm/(R/2)^2 =0.1GMm/R^2/4 =GMm(0.1x4)/R^2=0.4GMm/R^2 Hence
posted on July 12, 2013 
physics
what happend 2 ur mobile? i was trying 2 call u but i got this msg: welcome 2 D jungle network,D monkey u r tring 2 call is on tree plz try later.
posted on July 19, 2008