The ratio of time for completely emptying the hemispherical tank and circular horizontal tank of equal radii both fitted with similar orifices at their bottoms is :

• A. <img src="/_files/images/civil-engineering/hydraulics/160-7.249-1.png">
• B. <img src="/_files/images/civil-engineering/hydraulics/160-7.249-2.png">
• C. <img src="/_files/images/civil-engineering/hydraulics/160-7.249-3.png">
• D. <img src="/_files/images/civil-engineering/hydraulics/160-7.249-4.png">