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How large must the radius of heating duct be if air moving 3m/s along it can replenish the air of 300m3 room in every 15min?

How large must the radius of heating duct be if air moving 3m/s along it can replenish the air of 300m3 room in every 15min? 

Grade:12

1 Answers

Vikas TU
14149 Points
5 years ago
Dear Student,
volume = 3x15x60xa
=2700a
a=πr2
=>300=2700πr2
=>r2=1/9π
=>r=0.18m.
Cheers!!
Regards,
Vikas (B. Tech. 4th year
Thapar University)

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