A bus travels a certain distance with a speed 30 m/sec and returns with a speed 20 m/sec then find average speed during total journey.

Question

Vikas TU · Answer

Let t1 be the time to travel x distance with 30 m/sec. Therfore, t1 = x/30 …................(1) and t2 be the time to travel x distance with 20 m/sec. t2 = x/20 ….........(2) Average speed = Total Distance/Total time = 2x/(t1 + t2) =2x(x/30 + x/20) {from eqns. (1) and (2)) = 24 m/s {x gets cancelled out}

Ajay Choudhury · Answer

let the distance be x thus time taken to go=x/30 time taken to come=x/20 average speed=120x/5x =24m/s

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A bus travels a certain distance with a speed 30 m/sec and returns with a speed 20 m/sec then find average speed during total journey.

A bus travels a certain distance with a speed 30 m/sec and returns with a speed 20 m/sec then find average speed during total journey.

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