Candidate A can complete an obstacle course alone in 12 days and Candidate B in 18 days. How many days will they take working together?
Q1. Candidate A can complete an obstacle course alone in 12 days and Candidate B in 18 days. How many days will they take working together?
Answer: 7.2 days
Explanation: Their combined daily rate is 1/12 plus 1/18, which equals 5/36 of the course. The full course therefore takes 36/5 days, or 7.2 days.