A can do a work in 10 days. The efficiency of A is 20% less than B. How many day

Question

A can do a work in 10 days. The efficiency of A is 20% less than B. How many days B need to finish the same work?

Options:

A . 8.5 days

B . 12.3 days

C . 8 days

D . 7.5 days

Answer: Option C

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