Set up and solve an equation. Round to the nearest tenth. One farmer bales her hay in 15 days. A second farmer does it in 6 days. How many days will it take them working together?
A) 4.3 days
B) 0.2 day
C) 3.3 days
D) 21 days
E) 20 days

Question

Quizplus · Accepted Answer

The first farmer's rate is 1/15 bales per day, and the second farmer's rate is 1/6 bales per day. Together, their rate is 1/15 + 1/6 = 2/30 + 5/30 = 7/30 bales per day. To find the time it takes them working together, divide 1 bale by their combined rate: 1 / (7/30) = 30/7 days, which rounds to 4.3 days.

Set Up and Solve an Equation