00:01
That's we're told in one hour, isabella can prepare 120 spring rolls, and arturo can prepare 100 spring rolls.
00:09
So for part a, it says how long will it take to prepare 600 rolls if isabellito works by herself? now, we know that she can prepare 120 rolls in one hour, so she should be able to prepare 600 rolls in x hours.
00:30
To solve this, i'm going to cross my whole.
00:32
Multiply, so 120 times x equals 600 times 1, and then divide by 120.
00:43
So it will take her five hours.
00:50
For part two, if arturo works by himself, it will take 100 rolls for an hour.
00:57
So 600 rolls should take x hours.
01:01
And again, i'll solve by cross multiplying, 100 times x equals 600 times 1.
01:08
Divide both sides by 100.
01:12
I get x equals six hours.
01:17
So for part three, it asks, what if they work together? all right, so let's think about there are two ratios.
01:25
She can make 120 rolls in one hour.
01:29
You can make 100 rolls in one hour...