Question

A car traveling at a speed of. 52 km/hrs takes 6 hours to reach its destination. What should be the speed of the car if the journey is to be covered in 4 hours.



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Answer 1

actually speed =distance/time

here distance=52km,time=4hours

speed=52/4=13km/h

Answer 2

Given :-

▪ A car travelling at a speed of 52 km/hr takes 6 hours to reach its destination.

To Find :-

▪ The speed of the car such that the time taken by it to cover the same distance be 4 hours.

Solution :-

Here, In both the cases, the distance (destination of the car) would be same. So, First let us find the distance using the first case.

In case first, We have

• Speed = 52 km/hr
• Time taken = 6 hour

⇒ Distance = Speed × Time

⇒ Distance = 52 × 6

⇒ Distance = 312 km

Now, In the case 2, we have to find the speed of the car so that the time taken by the car be 4 hours. We have

• Distance = 312 km
• Time taken = 4 hours

⇒ Distance = Speed × Time

⇒ 312 = Speed × 4

⇒ Speed = 312 / 4

⇒ Speed = 78 km/hr

Hence, The speed of the car should be 78 km/h.