Math help understand
posted by Annie
Have world problem and I don't get it please explain step by step simplify and show me as many ways as possible cause one might be easier than other !!
A bicycle travels at constant speed of 15km/hr. Bus starts 195km behind bicycle and catches up to bicycle in 3 hrs. What's average speed of bus in km/hr????

Damon
They both travel for time t = 3 hours
the bike goes:
d = 15 t
the bus goes
d + 195 = v t
so
d = v t  195
but t = 3 so
15(3) = v(3)  195
45 = 3 v  195
3 v = 240
v = 80 km/h 
Steve
or, you can look at it like this. The bus makes up 195km in 3 hours, so it is going 195/3 = 65 km/hr faster than the bike.
15+65 = 80 km/hr
Respond to this Question
Similar Questions

Math
I still do not understand how to solve the following problem. Please show stepbystep. x = Integral (0 to v) dv/(q^2v^2) where q = constant the answer is > x = 1/2q ln (q+v/qv) 1) Where 1/2q came from? 
AP Physics
can you please explain this to me... Were given this eqaution x = At^2 + B were A = 2.10 m/s^2 B = 2.80 m ok and this is an example problem and it's wlking us through it find the instantaneous velocity at t=t2=5.00s equlas the slope … 
math
I don't understand this calculus problem at all. can someone show me step by step? 
chemistry
This question I really don't get it. I tried tried tried to figure out how to start solve the problem but still couldn't figure out. So can you help me with one question PLEASE? 
math
The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = 2i  4j. After a further … 
maths  two dimensional motion
The problem I am trying to solve is from AQA Mechanics M1 and is as follows: An object is moving in a plane. At time t=0, it is at the origin, O, and moving with velocity u. After 2 seconds it is at A where OA = 2i  4j. After a further … 
8 grade math
Can somebody please help me I don't understand this problem.? 
Math precalculus
Write an expression for all of the vertical asymptotes of y=3 csc(pi/4 *x) Can you list step by step to show how to do it , I don't understand this problem !!! Thanks 
Math
I need help solving the problem not the answer. (Multiple Choice) The steps below show the incomplete solution to find the value of x for the equation 7x + 8 − 3x = −6 + 10: Step 1: 7x + 8 − 3x = −6 + 10 Step 2: 7x + 8 − … 
math
10a) Simplify the expression and explain each step. 12 + 3(2y – 3) Step 1: apply distributive property Step 2: combine like terms Step 3: simplify b) Factor the expression completely. 18b – 12 What is the GCF of 18 and 12?