Answer:
45%
Step-by-step explanation:
Simply divide your partial amount (18 in this case) by your total (40), and you then multiply your answer from 18/40= .45 by 100, and you get 45. This is 45%
Hi,
Solving:

Equation haves a solution.
Hope this helps you understand your question better.
If you posses any additional questions you are welcome to comment below.
r3t40
Area of the border = 2(82 x 3) + 2(94 x 3) - 4( 3 x 3)
Area of the border = 492 + 564 - 36
Area of the border = 1020 m²
Answer: 1020 m²
<u>Answer:</u>
The lateral area of volcano is 323.361 km square
<u>Explanation</u>:
Given the diameter of the volcano (cone) = 20 km
Then, radius (r) = 20/2 = 10km
Height of the volcano (h) = 2.46 km
Given, the volcano has a distinctive cone shape
Then, lateral area of cone is given by the formula, 
Substituting the values,



= 323.361 km square
Therefore, the lateral area of cone is 323.361 km square