A certain unsharpened cylindrical #2 pencil is 1/2 centimeter in diameter and 25 centimeters long. What is the pencil's surface area

Question

A certain unsharpened cylindrical #2 pencil is1/2centimeter in diameter and 25 centimeters long. What is the pencil's surface area

Answer 1

To find surface area of a cylinder you need to know three formulas and then you add them together.

1 area of a circle

2 circumference of a circle

3 area of a rectangle

a cylinder had two circles. One on top and one on bottom. Find the area of those circles.

a cylinder also has a height.

multiply the height to the circumference of the cylinder .

Add up all the calculations and voila! You got the surface area of a cylinder.

for radius, remember to take half the diameter of 1/2 centimetres.

follow this and see if you get the answer. Else message me.