Question

A car goes from a town 'A' to another town 'B' with a speed of 40 km/h and return back to the town 'A' with a speed of 60 km/h. The average speed of the car during the complete journey is
(a) 48 km/h
(b) 50 km/h
(c) zero (d) none of the these​

Answer 1

Answer:

48km/h

Explanation:

Speed taken to go town A to town B=40 km/hr

Speed of car from going station B to A=60 km/hr.

Let the distance be x km.

Then the time will be distance /speed.

For A to B, Time taken=x/40.(t 1)

For B to A, Time taken=x/60.(t 2)

Total time =t 1 + t 2

=>x/40 + x/60 =( 3x + 2x)/120

-> 5x/120 = x/24

Average speed = Total distance / Total time

2x/x/24 =48 km /hr.

ANSWER = 48 km /hr.

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Answer 2

Answer:

here is your answer .....

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