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Physics 20 Online
OpenStudy (prakharluv):

A body travels at the uniform speed of 3m/s for 20 seconds, and then it stops for 10 seconds and then travels at speed of 2m/s. Its average speed during the motion is i 2.0m/s ii 2.5m/s iii 3.0m/s iv 0.2m/s

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