The curved surface area of a right circular cone is 2310 cm2 and its…

Question

The curved surface area of a right circular cone is 2310 cm2 and its radius is 21 cm. If its radius is increased by 100% and height is reduced by 50%, then its capacity (in litres) will be (correct to one decimal place)…

Accepted Answer

Option A. 25.9. Answer & Solution Answer: Option A Solution: & Curved surface area of cone = rl & 227 × 21 × l = 2310 & 66l = 2310 & l = 35 & Height = 35^2 - 21^2 & = 1225 - 441 & = 784 & = 28 cm & New radius = 21 + 21 = 42 cm & New height = 28 - 14 = 14 cm & New volume = 1/3 r^2h & = 1/3 × 227…

The curved surface area of a right circular cone is 2310 cm2 and its radius is 21 cm. If its radius is increased by 100% and height is reduced by 50%, then its capacity (in litres) will be (correct to one decimal place): ( Take = 227 )

Solution