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DRDO Multi tasking staff Model paper 5
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© examsnet.com
Question : 86
Total: 100
Two taps A and B fill a tank in 24 minutes and 32 minutes respectively. If both the taps are opened simultaneously, after how many minutes tap B should be closed so that the tank fills up in 18 minutes.
10 minutes
11.4 minutes
8 minutes
8.2 minutes
Validate
Solution:
Tap A fills 1/24 of the tank in 1 minute
Tap B fills 1/32 of the tank in 1 minute
Let,
After x minutes tap B should be closed
so,
⇒ 18/24 + x/32 = 1
⇒ x/32 = 1 - 18/24
x = 6/24 × 32 = 8minutes
© examsnet.com
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