Question

You can trim the grass using a lawnmower at a rate of 80 square feet per minute. You can use a string trimmer at a rate of 20 square feet per minute. The yard has an area of 2800 square feet. If you use the trimmer for 20 minutes, how many minutes will you use the lawnmower?
a 60
b 80
c 50
d 30

Answer 1

So first its 20 x 20 which is 400 so then the lawnmower does 80 per min so 80 x 5 and u get 400