Question

Please tell me how you get the answer!

swimming at a rate of 40 yards per minute for 30 minutes will burn 150 calories. How many minutes must a person swim at this rate to burn 900 calories?


Answer: 180

Answer 1

(40 yds/min)(30 min) = 1,200 yds

1,200/150 = y/900, so y = 7,200 yards

7,200 yds/(40 yds/min) = 180 minutes