A can do a piece of work in 32 days and B in 48 days. They work together for 8 days and then A goes away. In how much time (in days) will B finish the 60% of the remaining work?

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SSC GD Constable 2025 Official Paper (Held On: 04 Feb, 2025 Shift 1)
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Answer (Detailed Solution Below)

Option 2 :
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Detailed Solution

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Given:

A can do a piece of work in 32 days and B in 48 days. They work together for 8 days and then A goes away. In how much time (in days) will B finish the 60% of the remaining work?

Formula used:

Work done by A in 1 day = 1/32

Work done by B in 1 day = 1/48

Calculation:

Work done by A and B together in 1 day = 1/32 + 1/48

⇒ (3 + 2)/96 = 5/96

Work done by A and B together in 8 days = 8 × 5/96 = 40/96 = 5/12

Remaining work = 1 - 5/12 = 7/12

60% of remaining work = 60/100 × 7/12 = 7/20

Work done by B in 1 day = 1/48

Time taken by B to finish 7/20 of work = (7/20) / (1/48)

⇒ 7/20 × 48 = days

∴ The correct answer is option 2.

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