A car travels for time 
with a uniform velocity of 
on a straight road, and then
immediately reverses gear and travels for time 
on the same road with a uniform velocity of 
. The average velocity of the car in time interval 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Average velocity 
If 
is the direction of initial motion, then the first displacement (in forward direction) is
and the second displacement (in backward direction) is
Total displacement in 
time is
Average velocity, 
The correct answer is . The average velocity is 18 
in the forward direction.
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