Question

Find the area of the top surface of cylinder with radius 7cm and height 33 m​

Answer 1

Answer:

Given:

Radius r=7m, height =3m

We need to find the total surface area of a cylinder

 

=2πr(r+h)

=2×722×7(7+3)=440 sq meter

So, 440 sq m sheet of metal is required.

Answer 2

Answer:

The area of the top surface of cylinder is 153.86 $cm^{2}$

Step-by-step explanation:

Given -

Radius = $7\: cm$

Height = $33\:m$

To find -

The area of the top surface of cylinder

Solution -

The area of the top surface of cylinder is Circular.

So, here we have to use area of circle.

Area of circle = $\pi r^{2}$

Area of circle = $\pi 7^{2}$

Area of circle= $\pi 49$

Area of circle = $3.14\times 49$

Area of a circle = $153.86\: cm^{2}$

∴ The area of the top surface of cylinder is 153.86 $cm^{2}$