Mathematics
Medium
Question
wo pipes X and Y fill a tank in 15 hrs. and 20 hrs. respectively, while a third pipe ‘Z’ can empty the full tank in 25 hrs. All the three pipes are opened in the beginning. After 10 hrs. Z is closed. In how much time, will the tank be full ?
A
12 hrs
✓ Official correct answer
B
14 hrs
C
16 hrs
D
18 hrs
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A
12 hrs
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B
14 hrs
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C
16 hrs
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D
18 hrs
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