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ICSE Class 8 Answered

Water is being pumped out through a circular pipe whose internal diameter is 7cm. If the flow of water is 12cm/s,how many liters of water is being pumped out in an hour 
Asked by pandeymansi72 | 04 Mar, 2019, 07:29: PM
answered-by-expert Expert Answer
water flow rate  (cm3 / s ) = cross section area ( cm2 ) × speed of water flow ( cm/s )
 
                                           = ( π×3.5×3.5)×( 12 ) ≈ 462 cm3 /s
 
volume of water collected in 1 hour  = 462×3600/1000 ≈ 1662 litre
 
( conversion of cm3 to litre :  1000 cm3 = 1 litre is used )
Answered by Thiyagarajan K | 04 Mar, 2019, 08:33: PM

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