The height and curved surface area of a right circular cylinder are 7 cm and 70 π cm2. Its total surface area is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 120 π cm2
Formula used
The total surface area of a right circular cylinder = 2πr(h + r)
The curved surface area = 2πrh = 70π
r = 5 cm
Hence, The total surface area = 2πr(h + r) = 2 * π * 5 (7 + 5) = 120 π cm2