MCQ Practice

A alone can do a work in 14 days. B alone can do the same work in 28 days. C alone can do the same work in 56 days. They start the work together and completed the work such that B was not working on last 2 days and A did not work in last 3 days. In how many days (total) was the work completed?

Subject: MathematicsTopic: Time And Work
A

$$frac{{72}}{7}$$

B

$$frac{{79}}{7}$$

C

$$frac{{65}}{7}$$

D

$$frac{{82}}{7}$$

Correct Answer: A