A) Rs. 600
B) Rs. 700
C) Rs. 750
D) Rs. 800
Correct Answer: A
Solution :
[a] \[\because \]\[{{r}_{1}}=20%,\] \[{{r}_{2}}=25%\] and A = Rs. 900 Let cost price of cow to Ram be Rs. x. Then, \[x\left( 1+\frac{{{r}_{1}}}{100} \right)\,\left( 1+\frac{{{r}_{2}}}{100} \right)=A\] \[\Rightarrow \] \[x\times \frac{120}{100}\times \frac{125}{100}=900\] \[\therefore \] \[x=\frac{900\times 100\times 100}{120\times 125}=\text{Rs}.\,\,600\] |
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