Answer:

Step-by-step explanation:
To solve this problem we need to be familiar with the formula for the surface area of a cone:

We are given the length of a side and the diameter, to calculate the radius divide the diameter in half:

To calculate the height of the cone, we must use the Pythagorean Theorem:

We can treat the side length as the hypotenuse
, the radius as the base
, and solve for height
. Set the expression up like this:

Now we can plug into our original formula:

Option D:
Surface area of the cylinder = 753.6 cm²
Solution:
<u>To find the surface area of the cylinder:</u>
Given data:
Radius of the cylinder = 6 cm
Height of the cylinder = 14 cm
The value of π = 3.14
Surface area of the cylinder = 
= 226.08 + 527.52
= 753.6 cm²
Surface area of the cylinder = 753.6 cm²
Option D is the correct answer.
Answer:
the answer is 12-345
Step-by-step explanation:
14-6284
2057-358
2947-382
Answer:
.03397
Step-by-step explanation:
The fifth decimal is 7, and the number after that is 4. Because 4 is not greater than or equal to 5, we do not round up the 7.