Question

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

Answer 1

ANSWER:-

Given:

A 154m copper pipe with an outer radius is 5.5cm and inner radius is 4.5cm is melted to make a tap.

To find:

The volume of copper used to make the tap.

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

$= \frac{22}{7} *(5.5)^{2} *15400\:\:-\:\:\frac{22}{7} *(4.5)^{2} *15400\\\\=\frac{22}{7} *15400*[(5.5)^{2} \:\:-\:\:(4.5)^{2} ]\\\\=\frac{22}{7} *15400*[30.25\:\:-20.25]\\\\=\frac{22}{7} *15400*10\\\\=\: [22*2200*10]cm^{3} \\\\= 484000cm^{3}$

Thus,

The volume of copper used to make the tap is 484000cm³.

Answer 2

Answer:

48400cm

Step-by-step explanation:

length of pipe = 154 m