Number System
Quick practice
Question 1 of 5
Pipe P₁ can fill a tank in 16 minutes and pipe P₂ empties it in 24 minutes. If both the pipes are opened together, after how many minutes should P₂ be closed, so that the tank is filled in a total of 30 minutes?
A
18 min
B
20 min
C
16 min
D
21 min
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