Question

Plz help me if you're smart answer this plz​

Answer 1

6 hours!

Explanation:

90 lawns takes him 45 hours. If you simplify that, that means he can mow 2 lawns in 1 hour. 45 hours is 1/2 of 90 lawns, so whatever amount of lawns he mows, the time it takes him will be half the amount of lawns he mows. 6 hours is half of 12 lawns, so your answer is 6 hours!

I hope this helps!

Answer 2

6

Explanation:

The rate at which Darin can mow a lawn can be found by dividing the number of lawns mowed by the time in hours to mow that number.

Rate

= (Lawns mowed) / (Time)

= 90/45h

= 2/h

It takes Darin's service to mow 2 lawns one hour.

Time = 0.5(number of lawns)

Time = 0.5(12)

Time = 6