If 10 men can complete a project in 12 days, how many more men are required to finish it in 8 days? MCQ with Answer and Explanation

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If 10 men can complete a project in 12 days, how many more men are required to finish it in 8 days?

A. 5

B. 6

C. 4

D. 8

Answer: Option A

Solution (By JKSSB Mock Tests)

Using M1 * D1 = M2 * D2: 10 * 12 = M2 * 8 => 120 = 8 * M2 => M2 = 15 men. More men required = 15 - 10 = 5.

This question belongs to: Maths Time and Work

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Question #1

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A can complete a piece of work in 18 days, B in 24 days and C in 36 days. If they work together, in how many days will they finish the work?

A. 9 days

B. 8 days

C. 6 days

D. 7 days

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Correct Answer: Option B

Explanation:
Total work = LCM(18, 24, 36) = 72 units. Efficiency of A = 4, B = 3, C = 2. Combined efficiency = 4 + 3 + 2 = 9 units/day. Time taken together = 72 / 9 = 8 days.

This question belongs to: Maths Time and Work

Question #2

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A can complete a work in 24 days and B in 30 days. If both work together, in how many days will the work be completed?

A. 13.33

B. 18.33

C. 15.83

D. 20.83

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Correct Answer: Option A

Explanation:
Combined rate = 1/24 + 1/30. Time = 13.33 days.

This question belongs to: Maths Time and Work

Question #3

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A can complete a work in 17 days and B can complete the same work in 32 days. If they work together, in how many days will the work be completed?

A. 11.1

B. 13.1

C. 15.1

D. 17.1

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Correct Answer: Option A

Explanation:
Combined rate = 1/17 + 1/32. Time = 1 ÷ combined rate = 11.1 days.

This question belongs to: Maths Time and Work

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