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Q.

A car starts from rest and moves with constant acceleration. The ratio of the distance covered in the nth second to that covered in n seconds is

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a

2n2 −  1n

b

2n2 +  1n

c

2n  − 1n2

d

2n  + 1n2

answer is C.

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Detailed Solution

S=12an2Sn=12a(2n−1) Sn=2n−1n2=2n−1n2
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A car starts from rest and moves with constant acceleration. The ratio of the distance covered in the nth second to that covered in n seconds is