Question

A car takes 4 hours to cover a certain distance, travelling at a speed of 120 km/h. How long will the car take if it travels at a speed of 80km/h?

Answer 1

So the answer will be like
Let the time taken be x
4:120::x:80
120x= 80*4
x = 80*4/120
x=8/3
x= 2 2/3

Answer 2

3/8 hours

Explanation:

distance=speed/time=120/4=30km

time=distance/speed=30/80=3/8