1.

A car starts moving rectilinearly ( initial velocity zero) first with an acceleration of 5 ms^(-2) then uniformly and finally decelerating at the same rate till it stops. Total time of journey is 25 s and average velocity during the journey is 72 km/h. Car travels with uniformspeed for time

Answer»

1.5 s
7.5 s
20 s
15 s

Answer :D


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