Question

a bus travels 40km at a speed of 10m/s and the next 60km at the speed of 15m/s. calculate the average speed of bus during the journey.(Please answer in statement)

Answer 1

Hey......!!! here is ur answer......
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Given that, the first distance= 40km and speed= 10m/sec = 10×18/5km/h= 36km/h
then we know that,
time = distance/speed
time= 40/36= 10/9hrs
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and the second distance= 60km and speed = 15m/sec = 15×18/5= 54km/h
then we know that,
time =distance/speed
time = 60/54 = 10/9hrs
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Then we know that,
Average speed= (Total distance)/(Total time)
A.S.= (40+60)/(10/9+10/9)
A.S.= 100/(20/9)
A.S.= (100×9)/20
A.S.= 900/20
A.S.= 45km/h
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I hope it helps u......!!!!
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