Question

A car cover 360 km in 5 hours. What should be the speed of the car if it has to cover the same distance in 4 hours?

Answer 1

Answer:

90 km/hr

Step-by-step explanation:

Distance = 360 km

Time = 4 hours

Speed = Distace / time

= 360 / 4

= 90 km/hr

So, the car should have a speed of 90 km/hr to travel a distance of 360 km in 4 hours.

Answer 2

Given:

A cover covers 360 km in 5 hours.

To find:

The speed of the car for which it can

travel 360 km in 4 hours

Explanation:

$\sf Distance\: travelled,D=360 \: km$

$\sf time \: taken ,t_1=5\: hours$

we know that

$\boxed{\sf speed=\dfrac{distance}{time}}$

using the formula

$\longrightarrow \: \sf s = \dfrac{360}{5} = 75 \: km { h}^{ - 1}$

Now

$\sf for \:the\: car\: to \:travel \:same \\ \sf distance\: in\: 4 \:hours,speed=?$

$\longrightarrow \: \sf s = \dfrac{360}{4} = 90km {h}^{ - 1}$

So the speed should be increase by 15

km/hr inorder to cover 360 km in 4 hours