Answer:
6 hours
Step-by-step explanation:
Let the total work be X
Combined speed: X/2
Ron's speed: X/3
Harry's speed: S
X/2 = X/3 + S
S = X/2 - X/3 = (3X - 2X)/6 = X/6
Harry's speed is X/6, so he'll take 6 hours
Harry can clean in 6 hours if a room can be cleaned in 2 hours if rob and Harry work together. Ron could clean it in 3 hours.
Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
We have:
A room can be cleaned in 2 hours if rob and Harry work together. Ron could clean it in 3 hours.
Let's suppose harry can clean in x hours
So, we can frame a work-time relation from the problem:
1/x + 1/3 = 1/2
1/x = 1/2 - 1/3
1/x = 1/6
x = 6 hours
Thus, Harry can clean in 6 hours if a room can be cleaned in 2 hours if rob and Harry work together. Ron could clean it in 3 hours.
Learn more about the fraction here:
brainly.com/question/1301963
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