Q:

A) 6 | B) 8 |

C) 9 | D) 12 |

Answer: B) 8

Explanation:

Explanation:

$\begin{array}{ccccc}& & Amit& & Bharat\\ No.ofDays& & 45& & 40\\ Efficiency& & 2.22Percent(=\frac{1}{45})& & 2.5Percent(=\frac{1}{40})\end{array}$

Amit did the work in 56 days = $56\times \frac{1}{45\times 2}=\frac{28}{45}$

Therefore, Rest work 17/45 was done by Amit and Bharath = $\frac{{\displaystyle \raisebox{1ex}{$17$}\!\left/ \!\raisebox{-1ex}{$45$}\right.}}{{\displaystyle \raisebox{1ex}{$17$}\!\left/ \!\raisebox{-1ex}{$360$}\right.}}$ = 8 days

( since Amit and Bharath do the work in one day = $\frac{1}{45}+\frac{1}{40}=\frac{17}{360}$)