Question 49
Mensuration of SolidsA solid cylinder of radius 7 cm is 10 cm long. Find its total surface area.
- A.70π cm2
- B.189π cm2
- C.210π cm2
- D.238π cm2
Show the answer and explanation
Answer: D (238π cm2)
Explanation
2πrh + 2πr2 = 2π × 7 × 10 + 2π × 49 = 140π + 98π = 238π cm2.