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?
সমাধান
সঠিক উত্তর: Option B
এখানে, r2 = (52 - 42)
r = √(52 - 42)
= 3
সুতরাং কোণকের আয়তন = 1/3∏r2h
= 1/3Π × 32 × 4
= 12Π cm3