Question

a closed circular cylinder has diameter 20 cm and height 30 cm. find the total surface area of the cylinder.

Answer 1

Given diameter = 20cm.

Then the radius = 10cm.

Given height = 30cm.

Total surface of the cylinder = 2pir(h + r)

                                                = 2 * 3.14 * 10(10 + 30)

                                                = 2 * 3.14 * 10(40)

                                                = 2512 cm^3.


Hope this helps!

Answer 2

Answer:

Step-by-step explanation:

Given diameter = 20cm.

Then the radius = 10cm.

Given height = 30cm.

Total surface of the cylinder = 2pir(h + r)

                                               = 2 * 3.14 * 10(10 + 30)

                                               = 2 * 3.14 * 10(40)

                                               = 2512 cm^3.