A boat strik with under water rock which creates a hole `4cm` in diameter in the hull which is `1.2 m` below the water line. At what rate in litre per second dose water enter?

Explanation

Here, `r=2 cm, h=1.2 m=120 cm`,
Velocity of efflux, `v=sqrt(2 gh)=sqrt(2xx980xx120)`
Rate at which water enter the boat
`Q=pi r^(2) v=(22)/(7)xx(2)^(2)xxsqrt(2xx980xx120) cm^(3) s^(-1)`
`=(6096.81)/(1000)litre//s =6.097 litre//s`