Question

P and q can do a work in 30 days. Q and r can do the same work in 24 days and r and p in 20 days. They started the work together, but q and r left after 10 days. How many days more will p take to finish the work?

Answer 1

anybody help me for this question

Answer 2

Answer:

12

Step-by-step explanation:

Work done by P in 1 day = 1/15

Work done by Q in 1 day = 1/10

Work done by P and Q in 1 day = 1/15 + 1/10 = 1/6

Work done by P and Q in 2 days = 2 × (1/6) = 1/3

Remaining work = 1 – 1/3 = 2/3

Time taken by P to complete the remaining work 2/3 = (2/3) / (1/15) = 10 days

Total time taken = 2 + 10 = 12 days