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Compound Interest
A sum of mone...
Question
A
15
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B
10
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C
20
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D
12
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Solution
The correct option is B 10
Let sum = x
Then, 2x=x[1+R100]5
⇒ [1+R100]=21/5 ... (i)
4x=x[1+R100]T
⇒ 4=[21/5]T
⇒ 22=2T/5
⇒ T5=2
∴ T=10yrs.
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