A sector of a circle of radius 5 cm is recast into a right circular cone of height 4 cm. What is the volume of the resulting cone?

A 4π cm³

B 12π cm³

C 32π cm³

D 33π cm³

Correct Answer: Option B

এখানে, r² = (5² - 4²)
r = √(5² - 4²)
= 3

সুতরাং কোণকের আয়তন = 1/3∏r²h
= 1/3Π × 3² × 4
= 12Π cm³