A sum of Rs. 12,000 deposited at compound interest becomes double after 5 years. After 20 years, it will become: Options: A . &nbspRs. 96,000 B . &nbspRs. 1,20,000 C . &nbspRs. 1,24,000 D . &nbspRs. 1,92,000 E . &nbspNone of these

A sum of Rs. 12,000 deposited at compound interest becomes double after 5 years

Question

A sum of Rs. 12,000 deposited at compound interest becomes double after 5 years. After 20 years, it will become:

Answer: Option D
- 12000 x ( 1 + R ) 5 = 24000 100 ( 1 + R ) 5 = 2 100 ( 1 + R ) 5 100 4 = 24 = 16 ( 1 + R ) 20 100 = 16 P ( 1 + R ) 20 100 = 16P 12000 ( 1 + R ) 20 = 16 x 12000 = 192000 100

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