A) Rs. 1980
B) Rs. 1820
C) Rs. 1780
D) Rs. 1680
Correct Answer: D
Solution :
Let the boy will earn Rs. x in 7 days \[\left. \begin{matrix} 15 & : & 20 \\ 5 & : & 7 \\ \end{matrix} \right\}\,\,::\,\,900\,\,:\,\,x\] \[x=\frac{20\times 7\times 900}{15\times 5}\] \[=Rs.\,\,1680\]You need to login to perform this action.
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