SOLUTION: A car and a bicycle were travelling towards each other. The car travels at the rate of 20 km/hr and the bicycle at the rate of 15 km/hr. If the distance between them is 140 kilomet

Question 990879: A car and a bicycle were travelling towards each other. The car travels at the rate of 20 km/hr and the bicycle at the rate of 15 km/hr. If the distance between them is 140 kilometres, how long will it take for them to meet each other?
Found 3 solutions by Alan3354, macston, ikleyn:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
A car and a bicycle were travelling towards each other.if the car travels at the rate of 20 km/hr and the bicycle, 15 km/hr and if distance between them is 140 kilometres, how long will they meet each other?
================
The speeds are added when going in opposite directions.
20 + 15 = 35 km/hr
----
d = r*t
t = d/r

Answer by macston(5194)   (Show Source): You can put this solution on YOUR website!
Add the speeds of the car and bike:
20km/hr+15km/hr=35km/hr
They are approaching each other at 35km/hr.
.
How long will it take them to cover 140km at 35km/hr?
140km/(35km/hr)=4 hours
ANSWER: They will meet in 4 hours.
Answer by ikleyn(52786)   (Show Source): You can put this solution on YOUR website!
.
Answer. t = = = 4 hours.

Solution

Let t be the time they travel before to meet each the other.

Then the car will cover 20*t kilometers, and the bicycle will cover 15*t kilometers.

The sum of these distances is exactly 140 km.

So, you have an equation

20*t + 15*t = 140.

Solve it:

(20 + 15)*t = 140,

35*t = 140,

t = = 4 hours.

You may want to look into the lesson Travel and Distance problems in this site where you will find the examples of problems similar to yours.

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