To find surface area of 3D objects, you have to know the area formulas for basic shapes. For example, the area of a circle is

and the area of a rectangle is length times width. To find surface area of a cylinder, you will need to know both of those formulas, since the 3D shape involves both circles and rectangles.
Answer:
20
Step-by-step explanation:
divided 12 by three since it mirrors the shape on a smaller scale. you get 4. multiply that by five and there's your answer
A) 144/4 = 36 metres per side
b) 18*3 = 54
54+54+18+18= 144 metres
dimensions would be 54 by 18
The product of 289 and 7 is 2023
So 2023 is in between the pair of numbers 2022 and 2024
or even in between the pair of numbers 2020 and 2025. You can make a lot of pairs, haha.