Question

A car takes 7 hours to cover a certain distance at a speed of 48 km/h. If the distance is decreased by 20 km/h, how much time will be taken to cover the same distance.

Answer 1

Answer :

We know : Distance = Time $\times$ Speed
And
Given Car take 7 hr at speed of 48 km / hr
So,
Distance covered by car = 7 $\times$ 48 = 336 km
And
Now if speed decreased by 20 km , So new speed = 48 - 20 = 28 Km / hr
So,
Time take to cover same distance with new speed :

336 = Time $\times$ 28
So,
Time = 12 hr ( Ans )