A) Rs. 500 at the rate of 10%, Rs. 800 at the rate of 12%
B) Rs. 700 at the rate of 10%, Rs.600 at the rate of 12%
C) Rs.800 at the rate of 10%, Rs. 400 at the rate of 12%
D) Rs. 700 at the rate of 10%, Rs. 500 at the rate of 12%
Correct Answer: D
Solution :
Let the person invest amount x and y into two different rates of interest. \[\therefore \]\[\frac{x\times 12\times 1}{100}+\frac{y\times 10\times }{100}=130\]\[\left( \because SI=\frac{PRT}{100} \right)\] \[\Rightarrow \] \[12x+10y=13000\] ?(i) and \[\frac{y\times 12\times 1}{100}+\frac{x\times 10\times 1}{100}=134\] \[\Rightarrow \]\[12y+10x=13400\] ?(ii) On solving Eqs. (i) and (ii), we get x = Rs. 500 and y = Rs. 700You need to login to perform this action.
You will be redirected in
3 sec