A well 3 meters in diameter has its normal water level 3 meters below the ground level. By pumping water level in the well is depressed to 10 meters below the ground level. In 4 hours the water rises by 5 meters. Calculate the specific yield of the well.

• A. 2.213 m³/hr
• B. 5 m³/hr
• C. 1.242 m³/hr
• D. 3.224 m³/hr