A capillary tube is attached horizontally to a constant pressure head arrangement. If the radius of the capillary tube is increased by `10%`, then the rate of flow of the liquid shall change nearly by

Options

A. `+10%`
B. `46%`
C. `-10%`
D. `-40%`

Answer

B

Explanation

`Vpropr^(4), V'prop(r+1/10r)^(4)`
`(V')/V=(11xx11xx11xx11)/(10x10xx10xx10)=1.4641`
`((V')/V-1)xx100=46.4%`