A meter long metal rod (cylindrical is shape) of radius 3.5 cm is melted and recast to form cones of radius 1 cm and height 2.1 cm. Find the number of cones so formed.

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Solution

Length of the rod

Radius of the rod

Volume of the rod

Radius of the cone

Height of the cone

Volume of the cone

∴Number of cones formed

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A meter long metal rod (cylindrical is shape) of radius 3.5 cm is melted and recast to form cones of radius 1 cm and height 2.1 cm. Find the number of cones so formed.

Length of the rod Radius of the rod Volume of the rod Radius of the cone Height of the cone Volume of the cone ∴Number of cones formed

Length of the rod

Radius of the rod

Volume of the rod

Radius of the cone

Height of the cone

Volume of the cone

∴Number of cones formed