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A sum of money at compound interest doubles itself in 15 years. It will become eight times of itself in how many years at the same rate of interest per annum?

A60 years

B54 years

C48 years

D45 years

Answer:

D. 45 years

Read Explanation:

The sum becomes 2 times in = 15 years 8 times (2^3) = 15 × 3 8 times = 45 years


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