Find the volume of a cylinder which is formed by revolving plastic sheet of dimensions 14cm×7cm along its length
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volume of cylinder is πr^h
then the answer is
22/7×7×7×14cm^. === 2156cm^
then the answer is
22/7×7×7×14cm^. === 2156cm^
believers:
just answer???
how this can be the answer ,if it is folded along its length that means 2pir=14
can you thoroughly explain me
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Answered by
6
as, plastic sheet is revolved through its length
therefore , length of sheet = circumference of circle of cylinder
C= 2 pie r
14 = 2 × 22 ÷ 7 × r
therefore r = (49 ÷ 22 ) cm
volume of cylinder = pie r Sq. h
= 22 ÷ 7 × 49 ÷ 22 × 49 ÷ 22 × 7
so , the volume of cylinder = 109. 13 cube cm
therefore , length of sheet = circumference of circle of cylinder
C= 2 pie r
14 = 2 × 22 ÷ 7 × r
therefore r = (49 ÷ 22 ) cm
volume of cylinder = pie r Sq. h
= 22 ÷ 7 × 49 ÷ 22 × 49 ÷ 22 × 7
so , the volume of cylinder = 109. 13 cube cm
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