There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Rs. 12,000 after 3 years at the same rate?
A
2360
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B
3972
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C
3890
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D
None of these
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Solution
The correct option is B 3972 Let P = Rs. 100. Then, S.I Rs. 60 and T = 6 years. ∴R=(100×60100×6)= 10% p.a Now, P = Rs. 12000. T = 3 years and R = 10% p.a ∴C.I=Rs[12000×{(1+10100)3−1}]=Rs(12000×3311000) = 3972.