1
Question
A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?
[3 marks]
[3 marks]
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Solution
Given,
Radius of cylindrical tank (r) = 7 m
Height of cylindrical tank (h) = 3 m
Total surface area of cylindrical tank = 2π r(h+r)
[1 mark]
=2×227×7(3+7)=44×10=440 m2
[2 marks]
Hence, 440 m2 metal sheet is required.
Radius of cylindrical tank (r) = 7 m
Height of cylindrical tank (h) = 3 m
Total surface area of cylindrical tank = 2π r(h+r)
[1 mark]
=2×227×7(3+7)=44×10=440 m2
[2 marks]
Hence, 440 m2 metal sheet is required.
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