math
posted by Candice on .
the lawn order lawnmower factory can produce 12 lawnmowers in 8 hours. How many hours will it take the actory to produce 30 lawnmowers.

8 / 12 = 4 * 2 / (4 * 3 ) = 2 / 3 hours / lawnmower
30 * 2 / 3 = 60 / 3 = 20 hours
OR
8 / 12 = x / 30
8 * 30 = 12 * x
240 = 12 x Divide both sides by 12
240 / 12 = x
20 = x
x = 20 hours
OR
30 / 12 = 2.5
2.5 * 8 = 20 hours