A particle moves along the side AB, BC, CD of a square of side 25m with a velocity of 15m/s. Its average velocity is
A
15m/s
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B
10m/s
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C
7.5m/s
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D
5m/s
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Solution
The correct option is D5m/s As shown in the figure, total distance will be of length 3 sides but total displacement will be just side AD. Total time =25+25+2515=5s