The ratio of distance described by a body falling freely from rest in the last second of its motion to that in last but one second of its motion is 5:4 . Find the total time taken by the body to reach the ground ?
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Answer:
2x +4(2x+7)=3(2x+4)
2x + 8x + 28=6x + 12
10x + 28 = 6x +12
4x + 28= 12
4x=-16
x=-4
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