A) \[5%\]
B) \[6%\]
C) \[8%\]
D) \[10%\]
Correct Answer: A
Solution :
If rate of interest be R% p.a. then. \[SI=\frac{\text{Principal}\times Time\times Rate}{100}\] \[\therefore \] \[\frac{6000\times 2\times R}{100}+\frac{1500\times 4\times R}{100}=900\] \[\Rightarrow \] \[120R+60R=900\] \[\Rightarrow \] \[180R=900\] \[\Rightarrow \] \[R=\frac{900}{180}=5%\]You need to login to perform this action.
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