Question

Find curved surface area and total surface area of a right circular cylinder of radius 8cm and height 21 cm​

Answer 1

Answer:

CSA = 1056 $cm^{2}$

TSA = 200.96  $cm^{2}$

Step-by-step explanation:

Given:

r = 8cm

h = 21cm

To Find:

1. CSA
2. TSA

Formula Used:

1. CSA of a cylinder = 2πrh

2. TSA of a cylinder =  2πrh + 2π$r^{2}$

Solution:

CSA of the cylinder

= 2 * $\frac{22}{7}$ * 8 * 21

= 1056 $cm^{2}$

TSA of the cylinder

= 1056 + $\frac{22}{7}$ * $8^{2}$

=1056 + 200.96

=1256.96 $cm^{2}$