Q317
To do a certain work, the ratio of the efficiencies of A and B is 7 : 5. Working together, they can complete the same work in 171/2 days. A alone will complete 60% of the same work in:
To do a certain work, the ratio of the efficiencies of A and B is 7 : 5. Working together, they can complete the same work in days. A alone will complete 60% of the same work in:
A.
18 days
AnswerB.
15 days
C.
16 days
D.
21 days
Answer: Option A
Solution
Answer: Option A
Solution:
\begin{array}{*{20}{c}}
{}&{\text{A}}&:&{\text{B}} \\
{{\text{Efficiency}}}&7&:&5
\end{array}