Q. 534.8( 4 Votes )

A solid cuboid of iron with dimensions 53 cm × 40 cm × 15 cm is melted and recast into a cylindrical pipe. The outer and inner diameters of pipe are 8 cm and 7 cm respectively. Find the length of pipe.

Answer :

Outer and inner radius of the pipe: r’ = 8/2 = 4cm and r’’ = cm

Volume of cuboid = volume of pipe

L b h = π h[R2 – r2]

h = 2698.18cm ≈ 27m

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