Question

9. A 154 m long copper pipe with an outer
radius equal to 5.5 cm and inner radius
equal to 4.5 cm is melted to make a tap.
Find the volume of copper used to make
the tap?​

Answer 1

Answer:

Explanation:

We know that 1m= 100cm

then, 154m= [154× 100]cm

A copper pipe 15400cm long.

We have,

Outer radius,R= 5.5cm

Inner radius,r= 4.5cm

Now,

Volume of copper used to make the tap:

Volume of the outer cylinder - volume of inner cylinder

Formulas: πr²h cubic unit

see the pic......