Question

By travelling at a speed of 60 km/h, a car can complete a certain journey in 15 hours. What
should be the speed of the car in order to cover the same distance in 12 hours?​

Answer 1

initial speed=60km/h

time taken= 15hours

distance=speed×time

distance =15×60=900km

new time taken=12 hours

new speed=900/12=75km/h

Answer 2

Answer:

distance = speed × time

distance of journey = 60 × 15 km

now the person has to travel the same distance but in less time

let us reverse the relation

$speed \: = \frac{dista nce \: }{time} \\ speed \: = \frac{15 \times 60}{12} \\ speed = 75kmh$