Question

Elise takes 12 minutes to rake up and bag a pile of leaves.

Her sister Katherine takes twice as long. How many minutes would it
take both of them working together to complete 1 0 bags of leaves?

Answer 1

80 minutes

Explanation:

1/12 + 1/24 = 3/24

24/3 = 8 min

8 × 10 = 80