Practice30 Create account

A can do a piece of work in 30 days, B in 40 days, C in 60 days. A and B work for 6 days, then C replaces A. How many more days to finish?

Competition practiceTime & Work / Pipes

A13 1/5 days
B15 3/5 days
C14 days
D12 days

Step-by-Step Solution

6 days of

A + B : 6 \times \frac{4 + 3}{120} = \frac{42}{120}

. Left

\frac{78}{120}

with

B + C

at

\frac{3 + 2}{120}

a day:

\frac{78}{5} = 15 \frac{3}{5}

days.

Answer: B) 15 3/5 days

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Time & Work / Pipes practice questions

More Time & Work / Pipes practice

A can do a work in 24 days. After A has worked 6 days, B joins, and they finish in 8…A can finish a work in 6 days and B in 9 days. They work together for 2 days; then C…15 men working 8 hours a day finish a job in 20 days. How many men are needed to finish…12 men working 8 hours a day dig a 360 m trench in 18 days. In how many days will 16 men…3 men or 5 women can do a job in 12 days. How long will 6 men and 5 women take?