Question

Direction : (8-11) A, B and C can independently complete a piece of work in 20 days, 40 days and 60 days repectively. A worked alone for two days, then was joined by B. After another two days, C replaced A while B and C continued until the work was completed. After completion the contractor paid `142,80. Find the difference (in `) between the piece of A and C in the amount paid by the contractor after the completion of the work.

• A. 1,380
• B. 1,428
• C. 1,412
• D. 1,398

Answer 1

Answer: (B)