A can do a work in 20 days, B can do the same work in 30 days. If they work together for 10 days, ho

A. 1/3

B. 1/4

C. 1/2

D. 1/5

E. None of the above

Answer: A. 1/3

In 10 days, A and B together complete 1/2 of the work, leaving 1/2 of the work remaining, which is 1/3 of the total work.

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