Question

The thickness of a hollow cylinder is 1 cm. It is 7
cm long and its inner radius is 3 cm. The volume
of the wood required to make the cylinder is:​

Answer 1

Answer: r=3cm

h=7 cm

thickness=1cm

volume of wood used =volume of outer cylinder-volume of inner cylinder

=πR1^2h - πR2^2h

=πh(R1^2-R2^2)

= 22/7×7(3^2-2^2)

= 22 ( 9-4)

=22×5

=110cm^3. Answer                

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