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Question

A hollow right circular cylinder with height 8 cm and base radius 7 cm is opened out into a rectangle. What are the length and breadth of the rectangle respectively ?

A
22 cm, 16 cm
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B
44 cm , 8 cm
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C
22 cm, 8 cm
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D
44 cm, 16 cm
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Solution

The correct option is B 44 cm , 8 cm
Radius of base=7cm, Height=8cm
After opening, circumference of base=length of sheet
Length=2πr=2×227×7=44cm
And breadth =height=8cm

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