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A can finish a job in 10 days, B in 12 days, C in 15 days. A and B start; C replaces A after 2 days. How many more days are needed to finish?

Class 8Sharing Work and WagesDirect and Inverse Proportions

A4 days
B5 days
C4 2/9 days
D3 7/9 days

Step-by-Step Solution

2 days of

A + B : 2 (\frac{6}{60} + \frac{5}{60}) = \frac{22}{60}

. Left

\frac{38}{60}

with

B + C

at

\frac{5 + 4}{60} = \frac{9}{60}

a day:

\frac{38}{9} = 4 \frac{2}{9}

days.

Answer: C) 4 2/9 days

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