Question

A closed box 20 cm long .16 cm broad and 12 cm high is to be made from a sheet of metal . How much metal sheet will be required tell me the


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Answer 1

Explanation:

Length of the sheet=Circumference of the base.

⇒44=2πr

⇒r=44×

2

1

×

22

7

=7

∴ Radius=7cm

Breadth of the metal sheet=height of the cylinder

h=20cm

Curved surface area=2πrh

=2×

7

22

×7×20=880sq.cm

∴ Curved surface area is 880sq.cm

Answer 2

Answer:

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