CBSE Class 9 Answered
Average Speed
Asked by Baby12 | 10 Jun, 2008, 05:44: PM
Expert Answer
let the distance between the two places is a km
then time taken by the bus to cover 60% distance is .6a/40
time taken by the bus to cover next 40% is .4a/30
time taken by the body to cover back the whole distance is a/45
add all the time in terms of a then use the fornmula
average speed = total distance which is 2a / by total time (which is calculated above)
Answered by | 11 Jun, 2008, 12:01: PM
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