If the height of a right circular cylinder is 10 cm and the curved surface area is 440 cm2, then what is its radius?
Answer & explanation
Correct answer: option 4
We know that,
Curved surface area of the cylinder = 2πrh
Height = 10 cm
Radius = r cm.
2 πrh = 440
= 2 × \(\frac{22}{7}\) × r × 10 = 440
= r = 7 cm