Bob can shave a cat in 3 hours; Fred can do it in 4 hours. If they work together without wasting a ton of time like they always
do, how long will it take to shave the cat?
1 answer:
Answer:
The answer to your question is 1 5/7 or 1.7 hours ≈ 1:43 min
Step-by-step explanation:
Data
Bob lasts 3 hours
Fred lasts 4 hours
Together = ?
Process
1.- Determine what they do in 1 hour
Bob = 1/3 in x hours x/3
Fred = 1/4 in x hours x/4
2.- Write the equation to this problem
x/3 + x/4 = 1
3.- Solve it for x
(4x + 3x)/12 = 1
7x = 12
x = 12/7
x = 1 5/7 or 1.7 hours ≈ 1:43 min
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