Multiple choice

A and B can do a piece of work together in 40 days Their skills of doing the work are in the ratio 8:5 How many days will A alone take to finish the same work if engaged alone?

  1. 52

  2. 104

  3. 64

  4. 65
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the daily work rates of A and B be 8x and 5x respectively, making their combined rate 13x. Since they complete the work together in 40 days, the total work is 13x * 40 = 520x. If A works alone, the time required is 520x / 8x = 65 days.

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