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Question

The difference in S.I. and C.I. on a certain sum of money in 2 years at 15% p.a. is ₹144. The sum is .

A
₹6000
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B
₹6800
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C
₹6400
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Solution

The correct option is C ₹6400
C.I. - S.I. = ₹144
P{(1+R100)n1}PRT100=144
P{(1+15100)21}P×2×15100=144
P{(1+320)21}P×30100=144
P{(2320)21}P×30100=144
P{(529400)1}3×P10=144
P[129400310]=144
P[9400]=144
P=144×4009
=6400

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