Answer:
cylinder:
curved sa = 2πrh
=> rectangle, breath = h, width = perimeter of circle = 2πr
total sa = 2πrh+2πr^2
=> curved sa + area of 2 circles
cone:
curved sa = πrl
=> treated as a triangle, base = circumference of circle, height = slant height
total sa = πr^2+πrl
=> curved sa + area of base (circle)
Step-by-step explanation:
The correct answer for number 7 is B
So if the area of a square is 320 square meters, then because all four sides are equal, you would end up with the equation

which simplifies to