Answer :
Answer:
The correct answer is 20.
Step-by-step explanation:
Well, let's see the facts we have.
We know that the factory can produce 12 lawnmowers in 8 hours.
Now what we need to find out is how many hours it will take the factory to do 30 lawnmowers.
Having 3 data resolved and only one icognite, the most convenient thing would be to do a cross-multiplication.
If 8 hours ------ 12 lawnmowers
Then x hours ----- 30 lawnmowers.
x.12 = 30.8
x.12 = 240
x = 240:12
x = 20
With this information we can say that it will take 20 hours for the factory to do 30 lawnmowers.