A sum of money becomes 10 times in 18 years. In how many years will it become 100 times?
Explanation:
Let amount P becomes 10 times in 18 years. Hence, interest 9P (= 10P - P) is accumulated in 18 years.
For the same amount to become 100 times, an interest of 99P (= 100P - P) has to be accumulated.
Since, interest accumulated has to becomes 11 times, the time required will also be 11 times.
∴ Time required = 18 × 11 = 198 years.
Hence, 198.
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