A) 8 yr
B) 10 yr
C) 12 yr
D) 14 yr
Correct Answer: B
Solution :
Let the principal be Rs \[x\]. Amount = Rs \[3x\] Interest = Rs \[2x\] \[\therefore \] Time 20 \[\therefore \] \[I=\frac{P\times r\times t}{100}\Rightarrow 2x=\frac{x\times r\times 20}{100}\] \[\Rightarrow \] \[r=10\] In second case, \[I=\text{Rs}\,x\] \[P=\text{Rs}\,x\] \[r=10\] \[t=?\] \[\therefore \] \[I=\frac{P\times r\times t}{100}\] \[\Rightarrow \] \[x=\frac{x\times 10\times t}{100}\] \[\therefore \] \[t=10\,yr\]You need to login to perform this action.
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