A and B work together. A alone can complete the work in 24 days and B alone in 36 days. What percentage of the total daily work is contributed by A? MCQ with Answer and Explanation

Explanation:
Combined time for full work multiplied by 0.75 = 5.01 days.

Explanation:
Total work = LCM(30, 40) = 120 units. Efficiency of A = +4, B = -3. In 2 days, net work = 4 - 3 = 1 unit. We look for when the work reaches 120 - 4 = 116 units. 116 units are done in 116 * 2 = 232 days. On the 233rd day, A works and completes 4 units, making total work 116 + 4 = 120 units. Thus, the wall is completed in 233 days.

Explanation:
A share = (1/30) / (1/30+1/22) ×100 = 42.31%.