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A sum of money at simple interest dou...

A sum of money at simple interest doubles in 7 years. It will become four times in: (a) 18 years (b) 21 years (c) 38 years (d) 42 years

A

14 years

B

21 years

C

28 years

D

35 years

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The correct Answer is:
B
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UPKAR PUBLICATION -MISCELLANEOUS EXERCISE -VI-QUESTION BANK
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