Question

if 1cm³ of cast iron weighs 21 g, find the weight of a cast iron pipe of length 1m with a bore of 3 cm in which the thickness of the metal is 1cm​

Answer 1

Explanation:

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Answer 2

Answer:

Inner radius = (32) cm = 1.5 cm.

Outer radius = (1.5 + 1) = 2.5 cm

∴ Volume of iron = [π×(2.5)2×100−π×(1.5)2×100]cm3

= 227×100×(2.5)2−(1.5)2]cm3

= (88007)cm3

∴ Weight of the pipe = (88007×211000) kg = 26.4 kg.

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