Question

A venturimeter is connected to two points in the mains where its radii are `20 cm`. And `10 cm`. Respectively and the levels of water column in the tube differ by `10 cms`. How much water flows through the pipe per minute?

Answer 1

Correct Answer - [`2726.6 litres//minute`]
Volume of water flowing per sec,
`V=a_(1)a_(2)sqrt((2gh)/(a_(1)^(2)-a_(2)^(2)))`
where, `1a_(1)=pi r_(2)^(2)=(22)/(7)xx20^(2) cm^(2)`,
`a_(2)=pi r_(1)^(2)=(22)/(7)xx10^(2) cm^(2)`,
`g=980 cm//s^(2), h=10 cm`,
Volume of water flowing per minute
`=vxx60=a_(1) a_(2)sqrt((2gh)/(a_(1)^(2)-a_(2)^(2)))xx60 c.c//m` minute