A liquid flows in a tube from left to right as shown in figure. `A_(1)` and `A_(2)` are the cross-section of the portions of the tube as shown. Then the ratio of speeds `v_(1)//v_(2)` will be

Options

A. `A_(1)//A_(2)`
B. `A_(2)//A_(1)`
C. `sqrt(A_(2))//sqrt(A_(1))`
D. `sqrt(A_(1))//sqrt(A_(2))`

Answer

B

Explanation

`A_(1)v_(1)= A_(2)v_(2) rArr v_(1)//v_(2)= A_(2)//A_(1)`