Let radius r =5xLet height h = 12xWe have,Volume= 2512 m3= ×3.14×25x2×12x =2512= x3 = 8 = x = 2∴r =10 cm and h = 24 cmHence, slant height l = = = 26 cm

Q. 5

The radius and he

Class 9th RD Sharma - Mathematics 20. Surface Area and Volume of a Right Circular Cone

Answer :

Let radius r =5x

Let height h = 12x

We have,

Volume= 2512 m³

= ×3.14×25x²×12x =2512

= x³ = 8 = x = 2

∴r =10 cm and h = 24 cm

Hence, slant height l = = = 26 cm

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