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A body moving along straight line covers a distancein three equal parts with speed 2 m/s, 3 m/s and4 m/s, then its average speed is(1) 12 m/s(2)13/12 m/s(3) 36/13 m/s(4)12/13 m/s |
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Answer» Answer:36/13 Explanation: Let the total distance be 3X. The time REQUIRED are x/2 , x/3 and x/4 respectively . AVG SPEED = total distance/total time = 3x/x/2+x/3+x/4 =3x/13x/12 =36/13 m/s |
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