Question : A can do
Option 1: 15 days
Option 2: 10 days
Option 3: 18 days
Option 4: 12 days
Correct Answer: 12 days
Solution :
A can do
⇒ 1 day work of A =
B can do
⇒ 1 day work of B =
So, 1 day work of both A and B =
Work done by A and B together in 20 days = 20 ×
Remaining work = 1 –
This work is done by C in 8 days.
So, 1-day work of C =
1 day work of (A + B + C) =
So, the time taken by (A + B + C) =
Hence, the correct answer is 12 days.
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