pipe A can fill a tank in 50 min while pipe b takes an hour to fill it up pipe. A is opened first and the tank starts filling up. after 17 min, pipe B is also opened. In how many more minutes will the tank gets filled up?
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Explanation :
A can fill in 50 minutes.
B can fill in 60 minutes.
Together, they can fill the tank in = 1/(1/50 + 1/60) = 300/5 + 6 = 300/11 days.
In 17 minutes A can fill = 17/50 part.
Balance part remaining = 33/50
Now time needed to fill the balance = 33/50 * 300/11 = 18 minutes.
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