Aarti can do a piece of work in 5 days. In how many days will she complete three time of work of same type? Choose the correct answer: A) 6 days B) 18 days C) 21 days D) 3 days E) 15 days

Rationale: we have the important relation , more work , more time ( days ) a piece of work can be done in 5 days . three times of work of same type can be done in 5 x 3 = 15 days answer e
Answer: E