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