A) 15 yr
B) 20 yr
C) 30 yr
D) 12 yr
Correct Answer: B
Solution :
Amount = Rs. P and it will be three times in x yr. \[\therefore \] Amount in 10 yr = Rs. P \[\therefore \] Simple interest in 10 yr \[=\,2P-P=Rs.\,P\] Rate of interest in 10 yr\[=\frac{100\times P}{P\times 10}=10%\] Interest for 3 times amount \[=3P-P\] Time \[(x)=\frac{100\times 2P}{P\times 10}=20\,\,yr\]You need to login to perform this action.
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