A train accelerating uniformly from rest attains a maximum speed of 
in 20 s. It
travels at this speed for 20 s and is brought to rest uniform retardation in further 40 s. What is the average velocity during this period?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
According to question,
Further 
Therefore, acceleration is 
and retardation is 
.
Now, 
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