A cylindrical pipe 50m long with radius 7m has one end open. What is the total surface area of the pipe?

A.
749(pi)m^{2} 
B.
700(pi)m^{2} 
C.
350(pi)m^{2} 
D.
98(pi)m^{2}
Correct Answer: Option 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)