Question

Running at an average speed of 40km/hr, a bus completes a journey in 4 1/2 hours.How much time will the return journey take if the speed is increased to 45km/hr.

Answer 1

Answer:

The time required for the return journey is 4 hours.

Step-by-step explanation:

Given:

Average speed = 40 kmph

Time needed = 4 1/2 hours

Speed increased to = 45 kmph (while returning)

To find :

Time required for the return journey

Solution :

time = distance /speed

To get the time find the distance first.

distance = speed × time

⇒ 40 × 4.5

⇒ 180

Therefore,

distance = 180 km

New speed = 45 kmph

and distance = 180 km

time = distance / speed

⇒ 180 / 45

⇒ 4

Therefore,

The time required for the return journey is 4 hours.

Answer 2

Answer:

40 km/hr

4 1/2 Hours

=45 km/hr

Distance=Speed×time

=40×4.5

=180

Therefor,

distance=180

New speed =45km/hr

and distance=180km

time=distance/speed

= 180/45

=4

The time required for the return Journey is 4 hours.