Multiple choice

A and B can do a piece of work in 10 days and 15 days. They started the work for Rs. 2625, and complete it in 4 days with help of C. Find the share of C.

  1. 850

  2. 875

  3. 900

  4. 925

  5. 950
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A's work rate = 1/10 per day, B's rate = 1/15 per day. In 4 days, A does 4/10 = 2/5 of work, B does 4/15 of work. Together they do 2/5 + 4/15 = 6/15 + 4/15 = 10/15 = 2/3 of work. C completes the remaining 1/3, so C's rate = (1/3)/4 = 1/12 per day. Payment split: A gets 2625 × (4/10) = 1050, B gets 2625 × (4/15) = 700, C gets 2625 - 1050 - 700 = 875.

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