Question

A dancer demonstrating dance steps along a straight line. The displacement time graph is given.
Find the average speed for the dance step depicted by CD.

expand
A

B

C

D

Medium

Solution

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Correct option is
B

Average speed is defined as the ratio of the distance covered to the total time taken .

Average speed

For step CD 
Initial position is , final position is , hence distance covered
Total time is
So average speed is
So option is correct.

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