dimensions of a solid cuboid are 4.4m,2.6m,and 1m.it is melted and recasted into a hollow cylindrical pipe of inner radius 30cm and outer radius 35cm.find the length if the pipe
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Internal radius, r = 30 cm
Thickness, w = 5 cm
External radius, R = 30 + 5 = 35 cm
Here volume of cuboid = volume of hollow cylinder
440 × 260 ×100 = π(R2 – r2)h
⇒ 440 × 260 × 100 = π(352 – 302)h
⇒ 440 × 260 × 100 = π(325)h
∴ h = 11200 cm = 112 m
Thickness, w = 5 cm
External radius, R = 30 + 5 = 35 cm
Here volume of cuboid = volume of hollow cylinder
440 × 260 ×100 = π(R2 – r2)h
⇒ 440 × 260 × 100 = π(352 – 302)h
⇒ 440 × 260 × 100 = π(325)h
∴ h = 11200 cm = 112 m
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Livanshi1234:
very clear and very easy to understand
Thnx
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