20 Aug 2026

Two pipes P and Q would fill an empty cistern in 24 minutes and 32 minutes respectively. Both pipes open together, find when first pipes must be turned off so that empty cistern may be just filled in 16 minutes. Class 8

 

Two pipes P and Q would fill an empty cistern in 24 minutes and 32 minutes respectively. Both pipes open together, find when first pipes must be turned off so that empty cistern may be just filled in 16 minutes. Class 8

ANSWER- Turn off after 12 Minutes

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