If the capacity of a cylindrical tank is 1408 m³ and the depth of the tank is 7 meters, then the radius of its base is -

Correct option is D

Given, V = 1408 m³ and h = 7 m
We need to find 'r'. So, we plug the values into the formula:
1408 = πr² x 7
Divide both sides of the equation by 7π
r² = 1408 / (7π)
Using the approximation π ≈ 22/7
r² = 1408 / (7 x 22/7) r² = 1408 / 22 r² = 64
Take the square root of both sides:
r = √64 r = 8 m
Therefore, the radius of the base is 8 meters.