Pipe A fill a tank in 36minutes and pipe B fill a tank in 48minutes and both are opened togather take time to fill the tank in 24 minutes at what time pipe B closed?
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Answer:
Let the total capacity of the tank be 96 units (LCM of 24 & 32).
A fills =
24
96
= 4 units / minute.
B fills =
32
96
= 3 units / minute.
Let the time for which B is opened is x minutes.
According to the question, 4 × 18 + 3 × x = 96
3x = 96 - 72 = ⇒ 3x = 24
x = 8 minutes.
The pipe B should be closed after 8 minutes.
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