If the cylinder height is 9 cm and the base area is 25π cm2, then find the total surface area.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 440 cm2.
Base area = πr2
πr2 = 25π
r = 5 cm
Total surface area = 2πr(r + h)
⇒ 2 × × 5(5 + 9)
⇒ 4 × 22 × 10 = 440 cm2