A can complete a work in 29 days and B in 27 days. If both work together, in how many days will the work be completed? MCQ with Answer and Explanation

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A can complete a work in 29 days and B in 27 days. If both work together, in how many days will the work be completed?

A. 21.48

B. 13.98

C. 16.48

D. 18.98

Answer: Option B

Solution (By JKSSB Mock Tests)

Combined rate = 1/29 + 1/27. Time = 13.98 days.

This question belongs to: Maths Time and Work

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A tank can be filled by pipe A in 6 hours and emptied by pipe B in 8 hours. If both pipes are opened together, how much time will it take to fill the empty tank?

A. 18 hours

B. 12 hours

C. 24 hours

D. 14 hours

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Correct Answer: Option C

Explanation:
Total capacity = LCM(6, 8) = 24 units. Efficiency of A = +4, B = -3. Combined efficiency = 4 - 3 = 1 unit/hour. Time required = 24 / 1 = 24 hours.

This question belongs to: Maths Time and Work