A car is moving on the straight road and covered one fourth part with 36m/s and rest with 54m/s. find the average speed. (a) 11/3 m/s (b) 40/3 m/s (c) 27 m/s (d) 18 m/s
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velocity of 1/3 distance =36 m/s
velocity of remaining(2/3)=54 m/s
let total distance =d/3
so time will be for 1/3-
time for 2/3=
average speed= total distance /total time
=
=
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