#rooms cleaned in 1 hour # meals cooked in 1 hour
jacob 2 4
william 3 9
what is the minimum william would need to receive from jacob to be willing to cook another meal?
a) 1/3 of a clean room
b) 1/2 of a clean room
c) 2 clean rooms
d) 3 clean rooms

a) 1/3 of a clean room

Step-by-step explanation:

First at all, we need to calculate how much takes Jacob cleaning a room.

So we divide 1 hour by 2 rooms

1 hour = 60 min

and

Now, we must to know how much takes William to cook a meal:

In 60 minutes William cooks 9 meals

so we have:

that means William spends 6 minutes and 40 sec cooking a meal.\

Now we can solve:

In 6 minutes and 40 sec, how many rooms can Jacob clean?

We know Jacob spend 30 minutes cleaning a room so in 10 minutes or 1/3 of a clean room Williams had already cooked another meal. Thus, the closest answer is a)1/3 of a clean room.

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet