Question

give me the solution
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Answer 1

Step-by-step explanation:

• Given  
• Diameter of well is 16 m.
• So radius will be d/2 = 16/2 = 8 m
• Depth of well = 28 m
• Diameter of circular ring is 40 m
• So radius of circular ring will be 40/2 = 20 m
• Now inner radius r = 8 m
• And outer radius R = 20 + 8 = 28 m
• Let height of well dug be H
• Volume of well dug = volume of mud taken out from well.
• Therefore (πR^2 H – π r^2H ) = πr^2h
• (R^2 – r^2) H = r^2 h
• So H = r^2 h / R^2 – r^2
•         = 8^2 x 28 / 28^2 – 8^2
•        = 1792 / 720

     = 2.488 m