Hello from MrBillDoesMath!
Answer:
2 * (Pi r^2) + (Pi r^2)*h
where r = C/(2 Pi)
Discussion:
Total surface area of cylinder =
area of bottoms + surface area of cylinder =
2 * area of base + (area of base) * h
Generally, C = 2 Pi r, so r = C/(2 Pi) is known as we are given C. . Plugging this in the above equation gives
2 * (Pi r^2) + (Pi r^2)*h
Thank you,
MrB
4: 0.99
5: 0.66
6: 0.79
7: 5.2
8: 4.86
9: 4.3
I hope I helped! Also, one thing when you adding decimals or multiplying them, pretend the decimal point isn't even there. Then, once you have your answer, you just add the decimal in the middle. Basically just adding like in first grade! Super easy and I hope I helped!
