Question

A dam of water reservoir is built thicker at bottom than at the top because

• A. pressure of water is very large at the bottom due to its large depth.
• B. water is likely to have more density at the bottom due to its large depth.
• C. quantity of the water at the bottom is very large.
• D. none of the above.

Answer 1

Answer: (A)

pressure of water is very large at the bottom due to its large depth.

The pressure applied to walls of the dam will be a function of the amount of water that is over that particular point on the wall. So water pressure is very large at the bottom due to its large depth. That's why dams are constructed thicker at their bottoms than at their tops. So correct option is 'A'.