An object covers half the distance with a speed of 20m/s and the other half with a speed of 30m/s. Calculate the average speed of the whole journey.
Asked by manhas | 13th Jun, 2016, 07:06: PM
Let the total distance traveled by the object be 's'.
Give that it covers a half the distance, i.e. (s/2) with speed 20 m/s.
Time taken to cover this (s/2) distance is = = S/40
Then it covers the other half distance, i.e. (s/2) with speed 30 m/s.
Time taken to cover this (s/2) distance is = = S/60
Answered by Yashvanti Jain | 14th Jun, 2016, 10:28: AM
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