Download pipes and cistern two pipes p and q can fill a tank in 6 hrs resp.while a third pipe r can empty...

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pipes and cistern two pipes p and q can fill a tank in 6 hrs resp.while a third pipe r can empty... pipes and cistern two pipes p and q can fill a tank in 6 hrs resp.while a third pipe r can empty... pipes and cistern two pipes p and q can fill a tank in 6 hrs resp.while a third pipe r can empty...

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Download this and online watch pipes and cistern two pipes p and q can fill a tank in 6 hrs resp.while a third pipe r can empty...
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