Then she found a link to the math problem and it was a different answer
The Problem:
MY Logic:Pipe A fills a tank in 30 minutes. Pipe B can fill the same tank 5 times as fast as pipe A. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow?
Pipe A fills the tank in 30 minutes.
Pipe B = 5 times faster, so it will fill it in 6 minutes.
If you put them together, pipe A is helping out by 1/5th.
6 minutes in seconds is 360 seconds.
1/5th of 360 is 72.
360 seconds - 72 seconds = 288 seconds.
288 seconds = 4.8 minutes.
And 4.8 minutes = 4 minutes and 48 seconds
Thus, my answer = 4 minutes and 48 seconds
This page does it differently.
Their answer: 5 minutes
If I'm wrong, how so?