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Guest
Guest
Here is a simple question that's bothering me because my two friends got different answers from mine!
Ok, here it is:
At a constant rate flow it takes 20 min. to fill a swimming pool if a large hose is used, and 30 min. if a small hose is used. At these constant rates, how many minutes will it take to fill the pool when both hoses are used simultaneously?
My answer: 10 min. :? I just substracted 20 from 30 min.
My friends' answers: 12 and 13.33!!!
What would be your answer guys?
Thank you for your help
Ok, here it is:
At a constant rate flow it takes 20 min. to fill a swimming pool if a large hose is used, and 30 min. if a small hose is used. At these constant rates, how many minutes will it take to fill the pool when both hoses are used simultaneously?
My answer: 10 min. :? I just substracted 20 from 30 min.
My friends' answers: 12 and 13.33!!!
What would be your answer guys?
Thank you for your help