In a casting process the height of the molten metal from the ingate to the pattern is 0.5 m, then the velocity of flow of the molten metal through the in gate is __________ (Assume acceleration due to gravity as 10 m / s2 )

• A. 10 m / s
• B. \( { \sqrt{10}}~m~/~s\)
• C. 0.5 m / s
• D. √5 m / s