If a sum of money at simple interest doubles in 6 years, it will become 4…
2017
If a sum of money at simple interest doubles in 6 years, it will become 4 times in:
- A.
12 years
- B.
14 years
- C.
16 years
- D.
18 years
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Correct answer: D
With simple interest, doubling in 6 years means interest equals the principal in 6 years. To become 4 times, interest must be 3 times the principal, so time = 3 x 6 = 18 years.