a lead pencil is in the shape of cylinder pencil is 21 m long with inner radius 0.1 cm and Outer radius 0.4 cm what is the volume of wood in pencil
Answers
Answered by
1
h=21m=2100cm
R=0.4cm
r=0.1 cm
wood of pencil= pi.h. [(R^2)--(r^2)]
=(22/7)2100 [(0.4^2)--(0.1^2)]
=6600 [(0.4+0.1)(0.4--0.1)]
=6600×0.5×0.3 =990cm^2
Similar questions