Throughout these problems, keep in mind that the equation of Surface Area for a Cylinder is 2πrh+2πr^2, where r = radius and h = height.
10.
If the diameter is 6, then the radius is 3. Solve[tex]2 \pi (3)(12) + 2\pi (3)^2 \\ 72\pi+18\pi \\ 90\pi [/tex]:
That equals 282.74 cm approximately.
11.
The lateral surface area is just 2πrh. Let's substitute:
[tex]2 \pi (10)(6) \\ 120\pi \\ 376.99[/tex]
That equals 377 ft approximately.
12.
[tex]2\pi(4)(9) \\
72\pi[/tex]
That equals 226.19 in approximately.
13.
If the diameter is 14, then the radius is 7.
[tex]2\pi(7)(2) \\ 28\pi[/tex]
That is 87.96 m approximately.
One of the best ways to learn is to check others' work. I may be wrong, so double-check yourself! Hope these help! ;P
