A cylindrical pipe 50m long with radius 7m has one end open. What is the total surface area of the pipe?
-
749\(\pi\)m2
- 700\(\pi\)m2
- 350\(\pi\)m2
- 98\(\pi\)m2
The correct answer is: A
Explanation
Total surface area of the cylindrical pipe = area of circular base + curved surface area
= \(\pi\)r\(^2\) + 2\(\pi\)rh
= \(\pi\) x 7\(^2\) + 2\(\pi\) x 7 x 50
= 49\(\pi\) + 700\(\pi\)
= 749\(\pi\)m\(^2\)
There is an explanation video available .