1

Problem

Determine the total surface area of a cone whose base radius is 8 cm and slant height is 14 cm.Use π value is 3.14.

2

Step

Given that the height (h) is
radius(r) is

h = 14 cm,
r = 8 cm

3

Formula

Total surface area of a cone (A) is

A = πr(r+l)

4

Step

Substitute the values into the formula

A = 3.14 × 8(8 + 14)
A = 552.64

4

Solution

So, the total surface area of a cone (A) is \$552.64cm^2\$.

5

Sumup

Please summarize Problem, Clue, Hint, Formula, Steps and Solution

Choices

6

Choice-A

It is correct option for total surface area of cone using given radius and slant height

Correct \$552.64cm^2\$

7

Choice-B

This is lower than the correct value, so it’s incorrect

Wrong \$550.01cm^2\$

8

Choice-C

This is also lower than the correct value, so it’s incorrect

Wrong \$551cm^2\$

9

Choice-D

This is higher than the correct value, so it’s incorrect

Wrong \$552.14cm^2\$

10

Answer

Option

A

11

Sumup

Please summarize choices