A cylinder has a volume of 200 cubic centimeters and a side area of 100 cubic centimeters. What's the surface area?

A cylinder has a volume of 200 cubic centimeters and a side area of 100 cubic centimeters. What's the surface area?

Volume = π × radius & # 178; × height
Side area = 2 × π × radius × height
So:
Radius △ 2 = 200 △ 100 = 2cm
Radius = 2 × 2 = 4cm
Surface area
=2 × bottom area + side area
=2×3.14×4²+100
=100.48+100
=200.48 square centimeter
I'm very happy to answer for you. I wish you progress in your study! 523 will always answer for you~~
If you agree with my answer, please click the [select as satisfactory answer] button below. Thank you~~
If you have any other questions, please ask me for help. The answer is not easy. Please understand~~

If the height of a 5 cm cylinder increases by 3 cm, its surface area will increase by 18.84 square cm. What is the volume of the original cylinder?

The circumference of the bottom surface of the original cylinder is: 18.84 △ 3 = 6.28 (CM), the radius of the bottom surface of the original cylinder is: 6.28 △ 3.14 △ 2 = 1 (CM), the volume of the original cylinder is: 3.14 × 12 × 5 = 15.7 (cm3), a: the volume of the original cylinder is 15.7 cm3

The side area of a cylinder is 942cm2, its volume is 2355cm3, and its bottom area is______  cm2．

According to the stem analysis, we can get: the radius of the bottom of the cylinder: 2355 ^ (942 ^) 2, = 2355 ^ 471, = 5 (CM), 3.14 × 52 = 78.5 (square cm), answer: the bottom area is 78.5 square cm. So the answer is: 78.5