A can do a work in 19 days and B in 17 days. In how many days will they complete 75% of the work together? MCQ with Answer and Explanation

A can do a work in 19 days and B in 17 days. In how many days will they complete 75% of the work together?

A. 14.23

B. 11.73

C. 6.73

D. 9.23

Answer: Option C

Combined time for full work multiplied by 0.75 = 6.73 days.

This question belongs to: Maths Time and Work

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Question #1 Report Error

A can do a work in 19 days and B in 29 days. In how many days will they complete 75% of the work together?

A. 16.11

B. 11.11

C. 8.61

D. 13.61

Correct Answer: Option C

Explanation:
Combined time for full work multiplied by 0.75 = 8.61 days.

This question belongs to: Maths Time and Work

Question #2 Report Error

A can do a work in 13 days and B in 17 days. In how many days will they complete 75% of the work together?

A. 13.02

B. 8.02

C. 10.52

D. 5.52

Correct Answer: Option D

Explanation:
Combined time for full work multiplied by 0.75 = 5.52 days.

This question belongs to: Maths Time and Work

Question #3 Report Error

A and B work together. A alone can complete the work in 18 days and B alone in 30 days. What percentage of the total daily work is contributed by A?

A. 67.5

B. 70.0

C. 62.5

D. 65.0

Correct Answer: Option C

Explanation:
A share = (1/18) / (1/18+1/30) ×100 = 62.5%.

This question belongs to: Maths Time and Work