A car can cover a distance in 4hours at speed 60kmph then by what percent should the speed of car be increased to cover the same distance in 2.5hr ?
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A car covers a certain distance in 4 hours if it is travelling at a speed of 60km/hr . Howmuch time would it have taken if it were travelling 20km/hr faster
Expert Answer:
We know that speed is a physical quantity which is defined as the ratio of distance upon time.
Therefore,
distance = speed x time
distance = 60 x 4 = 240 km
If the speed was 60 + 20 = 80 km/hr
Then the same distance would have been covered in
time = distance / speed = 240 / 80 = 3 hrs
Thus, if the speed were 80kmph, it would have taken only 3 hours to cover the same distance.
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