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Question : A alone can do a piece of work in 30 days. He worked at it for 5 days and then B alone finished the remaining work in 10 days. In how many days B alone can finish the entire work?

Option 1: 12 days

Option 2: 15 days

Option 3: 10 days

Option 4: 18 days


Team Careers360 2nd Jan, 2024
Answer (1)
Team Careers360 12th Jan, 2024

Correct Answer: 12 days


Solution : 1 day's work of A $=\frac{1}{30}$
5 day work of A $=\frac{5}{30}=\frac{1}{6}$
Remaining work = $1-\frac{1}{6}=\frac{5}{6}$
Now, the remaining work can be finished by B in 10 days
So, B alone can finish the work in $=\frac{10}{\frac{5}{6}}$
$=\frac{60}{5}=12$ days
Hence, the correct answer is 12 days.

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