Water flows with a velocity V in a tube of diameter d and the rate of flow is Q. another tube of diameter 2d is coupled to the first one. The velocity of water flowing out and rate of flow in the second tube are respectively.

Options

A. `(V)/(4)` and `Q`
B. `(V)/(2)` and `(Q)/(2)`
C. `2V` and `2Q`
D. `(V)/(2)` and `2Q`

Answer

1

Explanation

`A_(1)v_(1)=A_(2)v_(2),V_(1)d_(1)^(2)=V_(2)d_(2)^(2)`