15 men work 8 hours per day to complete the work in 10 days. To complete the same work in 8 days, working 15 hours a day, the number of men required?  Choose the correct choice from the following answers:
A) 10 days  B) 11 days  C) 9 days  D) 8 days  E) 12 days

Rationale: "that is , 1 work done = 15 × 8 × 10 then , 12 8 × 10 = ? × 15 × 8 ? ( i . e . no . of men required ) = 15 × 8 × 10 / 15 × 8 = 10 days a )"
Answer: A