Question

What is the approximate surface area of this pencil? (Use 3 point one four for pi. Round your answer to the nearest whole number.)

A pencil that comes to a point at the end is shown. The part of the pencil that does not come to a point is fifteen centimeters long. The diameter is zero point six centimeters. The top of the pencil, which comes to a point, has a slant height of 2 centimeters.

Answer 1

Please could someone explain to me how to do it? I am really having trouble

Answer 2

I am thinking that the pencil can be thought of as a right circular cylinder topped by a right circular cone. See the uploaded image.

Answer 3

The task is to find the surface area of a cylinder with base radius .3 cm and height 15 cm and then to that to add the lateral area of a right circular cone with base radius .3 cm and slant height 2 cm.. Note: the surface area of the cylinder will include only one base along with the lateral area of the cylinder.

Answer 4

Pencil Surface Area
-----------------
2 pi r h + B where B is the area of one circular base
2 pi (.3) (15) + pi (.3)^2
Exposed Surface Area of Cylinder is: 9.09 π

Lateral Area of Cone
=============
LA = pi r L
pi (.3)2
LA of Cone = .6 π

Surface Area of Entire Pencil = 9.09 π + .6π = 9.69 π square centimeters --> Answer

Answer 5

U DID IT WRONG

Answer 6

help please?