"A swimming pool is filled by three pipes with uniform flow. The first two pipes operating
Channel: Doubtnut
Date: 2019-12-27

"A swimming pool is filled by three pipes with
 uniform flow. The first two pipes operating simultaneously fill the pool in
 the same time during which the pool is filled by the third pipe alone. The
 second pipe fills the pool 5 hours faster than the first pipe and 4 hours
 slower than the third pipe. The time required by the first pipe is
`6\\ h r s`
b. `10\\ h r s`
c. `15\\ h r s`
d. `30\\ h r s`"

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