The weight of a solid sphere of radius 6cm is 27kg. what is the weight of hollow sphere made up of same metal metal and 2cm thickness with external radius 8cm.
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Answer:
18.5 k9
Description for Correct answer:
Volume of solid sphere of radius 4 cm
= 43π(4)3cm3
Volume of hollow sphere
= 43π[(8)3−(6)3]cm3
Weight of 43π(4)3cm3 = 4 kg
Weight of 43π[(8)3−(6)3]cm3
= 443π(4)3 .
43π[(8)3−(6)3]
=4(512−216)43 = 18.5 kg
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