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Sagot :
Answer:
- (C) 440 cm²
Step-by-step explanation:
Volume:
- V = πr²h
Given r = 5 cm and V = 110 cm³, find h:
- 1100 = π(5²)h
- 1100/25 = πh
- 44 = πh
Curved surface area:
- S = 2πrh = 2*5*πh = 10*44 = 440 cm²
Correct choice is C
Answer:
(A) 440 cm²
Step-by-step explanation:
Volume of a right circular cylinder = 1100 cm²
πr2 h = 1100 cm³
Here r = 5
(22/7) ⋅ (5)2 ⋅ h = 1100
h = 2/7
Curved surface area of cylinder = 2 πr h
= 2 ⋅ (22/7) ⋅ 5 ⋅ (2/7)
= 440 cm²
So, the curved surface area of cylinder is 440 cm²
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