Question

A motorist travelling at an speed of 100 km/h took 4 hours to complete his journey. How long will he take if his average speed is 120km/h ?

Answer 1

Answer:

speed=100 kmph

time=4 h

distance=speed*time=400 km

distance = 400 km

speed= 120 kmph

time=distance/speed=400/120=3 1/3 hours.

PLEASE MARK AS BRAINLIEST.

Answer 2

FORMULA TO BE USED

$time\: = \frac{distance}{speed} \\ \\ distance = speed \times time$

GIVEN

when motorist travel with speed of 100 km/h then time taken by him to cover a certain distance is 4 hrs

therefore,

distance travelled = 100 × 4

distance travelled = 400 km

Now he have to cover this distance with a speed of 120 km/hr

so,

time taken by him = 400 / 120

time taken by him = 3 hrs.

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