The outer diameter of a metallic pipe is 18 cm and the thickness of the pipe is 2 cm and the height is 4 cm . Find the surface area of the metallic pipe.
Answers
The outer diameter of a metallic pipe is 18 cm and the thickness of the pipe is 2 cm and the height is 4 cm. Find the surface area of the metallic pipe.
Medium
Open in App
Open_in_app
Solution
verified
Verified by Toppr
Given:
Thickness =2 cm
Outer diameter of metallic pipe =18 cm
∴ Outer radius (R) =9 cm
Then inner radius =9−2=7 cm
Height of pipe =4 cm [Given]
The surface area of outer pipe =2πRh
=2π×9×4
=72π cm
2
Inner surface area of pipe =2πrh
=2×π×7×4
=56π cm
2
Hence, surface area of metallic pipe =72π−56π
=16π cm
2