दस पाईप एक टंकी को 28 मिनट मे – McqOptions

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1.	दस पाईप एक टंकी को 28 मिनट मे भरते है \| तीन पाईप खराब हो जाने पर टंकी कितनी देर में भरी जायगी ?
A.	20
B.	345.32
C.	56
D.	40
Answer» E.

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