Question

A hollow cylindrical copper pipe is 210 cm long its outer and inner diameter are 10cm and 6cm find the volume of copper used in making pipe

Answer 1

VOLUME OF COPPER USED = π× (R^2- r^2)×h

Radius of outer part = D/2 =5cm

radius of inner part= D'/2 =3cm

h =210 cm

V= 22/7 ×( 25 -9) ×210

V= (22×16×210)/7

V = 10560 cubic cm

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