The formula for the total surface area of a hollow cylinder is given by:
A = 2π(r₁+r₂)h + 2π(r₂² - r₁²)
Given:
Inner radius (r₁) = 7 cm
Outer radius (r₂) = 14 cm
Height (h) = 30 cm
Using these values in the formula, we can calculate the total surface area of the hollow cylinder:
A = 2π(7 + 14)30 + 2π(14² - 7²)
A = 2π(21)30 + 2π(196 - 49)
A = 2π(21)30 + 2π(147)
A = 1260π + 294π
A ≈ 1554π
Therefore, the approximate total surface area of the hollow cylinder is 1554π square centimeters.
Find the total surface area of a hollow cylinder with an inner radius of 7cm , outer radius 14cm and a height of 30cm
1 answer