Question

A can do a piece of work in 10 days and B in 20 days. They begin together but A leaves 2 days before the completion of the work. The whole work will be done in.

• A. 8 days
• B. 7 2/3 days
• C. 7 days
• D. 6 days

Answer 1

Answer:

A. 8 days

Let the required days be x A work for (x-2) days, while 'B' work for 'x' days According to the question, (x - 2)/10 + x/20 = 1 2x - 4 +x = 20 3x =24 x = 8 days