a lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior the diameter of pencil is 7 mm and the diameter of graphite is 1 mm if the length of the penis size is 14 cm find the volume of wood
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hii!!
here's ur answer...
given the diameter of the graphite filled in the pencil is 1mm. therefore radius = 0.5mm
height (length) of the pencil is 14cm
in mm = 14×10
= 140mm
volume of the graphite = πr²h
= 22/7×0.5×0.5×140
= 22×0.5×0.5×20
= 110mm³
diameter of the pencil = 7mm, therefore radius = 7/2mm
volume of the pencil = πr²h
= 22/7×7/2×7/2×140
= 11×7×70
= 5390mm³
hence volume of the wood in the pencil = 5390-110
= 5280mm³
hope this helps..!
here's ur answer...
given the diameter of the graphite filled in the pencil is 1mm. therefore radius = 0.5mm
height (length) of the pencil is 14cm
in mm = 14×10
= 140mm
volume of the graphite = πr²h
= 22/7×0.5×0.5×140
= 22×0.5×0.5×20
= 110mm³
diameter of the pencil = 7mm, therefore radius = 7/2mm
volume of the pencil = πr²h
= 22/7×7/2×7/2×140
= 11×7×70
= 5390mm³
hence volume of the wood in the pencil = 5390-110
= 5280mm³
hope this helps..!
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2
Given :
• Radius of pencil
• Radius of graphite
• Height of pencil = 14 cm
___________
___________
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