See the attached picture:
Im guessing he answered 30 correct, let me know if im correct
Lateral surface area of a cylinder: 2πrh, r is the radius, h is the height.
area of the top and bottom circle: πr²
when h=2r, the total surface area is:
2πr(2r)+πr²+πr²=6πr²
the answer is 6πr²
Answer:
5x-2
Step-by-step explanation:
2x+3x=5x
5-7=-2
