A car can finish a certain journey in 10 hours at the speed of 48 km/h – InterviewSolution

1.

A car can finish a certain journey in 10 hours at the speed of 48 km/hr. By how much should its speed be increased so that it may take only 8 hours to cover the same distance?

Answer»

Let us consider the speed of the car as ‘x’ km/hr.

Time (hrs.)	10	8
Speed (km/hr.)	48	x

We know k = xy

10 × 48 = 8 × x

x = (10×48)/8

= 60

Increased speed = 60 – 48 = 12km/hr.

∴ The speed should be increased by 12 km/hr. to cover the same distance.

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