A is twice as good as B and together they finish a piece of work in 14 days. How many days will A take to finish the work alone?
Q1. A is twice as good as B and together they finish a piece of work in 14 days. How many days will A take to finish the work alone?
Answer: 21 days
Explanation: If A is twice as good as B, then A's work rate is 2x and B's is x. Together, their rate is 3x. So, 1/(3x) = 1/14, giving x = 1/42. A's rate = 2/42 = 1/21, so A takes 21 days.