Railways
R.R.C. (Secundrabad) Solved Paper Held on 1-12-2013
question_answer
If 15 boys earn Rs. 900 in 5 days, how much will 20 boys earn in 7 days?
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 \[\left. \begin{matrix} 15 & : & 20 \\ 5 & : & 7 \\ \end{matrix} \right\}\,\,::\,\,900\,\,:\,\,x\] \[x=\frac{20\times 7\times 900}{15\times 5}\] \[=Rs.\,\,1680\]