Question

by traveling at a speed of 54km per hour a car can finish a certain journey in 12 hour what should be the speed of a car in order to cover the same distance in 9 hour?

Answer 1

distance = speed x time
54 x 12
= 648 km
speed = distance / time
speed = 648 /9
72 km/h

Answer 2

SOLUTION

Distance = Speed × Time

Distance = 54 × 12

Distance = 648km

New Given Time = 9 hour

So, New Required Speed

Speed = Distance/Time

Speed = 648/9

Speed = 72km/h

The speed of car in order to cover same distance in 9 hour is 72 km/h

*EXTRA*

Change in Speed

72km/h –54km/h

= 18 km/h

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