A) 5%
B) 7%
C) 8%
D) 10%
Correct Answer: D
Solution :
\[\frac{5000+2\times R}{100}+\frac{3000\times 4\times R}{100}=2200\] \[\Rightarrow \] \[100R+120R=2200\] \[\Rightarrow \] \[220R=2200\] \[\Rightarrow \] \[R=\frac{2200}{220}=10%\]You need to login to perform this action.
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