If the curved surface area of a cylinder is 880 cm2 , then the product of its height and radius is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 140 cm2.
The curved surface area of a cylinder = 880 cm2
Let the height and radius of the cylinder be H and R respectively.
So, 2πRH = 880
⇒ 2 × (22/7) × R × H = 880
⇒ (44/7) × R × H = 880
⇒ R × H = 880 × (7/44) = 140
Therefore, the product of its height and radius is 140 cm2.