Question

A truck coves a distance of $20$ km in $30$ minutes. How much time will take to travel $15$ km? How much distance will it cover in $45$ minutes?

Answer 1

Given:

The distance covered by the truck is = $20km$

The time taken by the truck is = $30min$ or $0.5hr$

So, the speed of the truck is

$v=\frac{distance}{time}$

$=\frac{20}{0.5}=40km/hr$

So, time taken to travel $15km$ is:

$time=\frac{distance}{speed}$

$=\frac{15}{40}=0.375hr$

or $=22.5min$

The distance covered by the truck in $45min$ will be:

$distance=speed\times time$

$=(40km/hr\times \frac{45}{60}hr)=30km$