Sum of the radius of the base and height of a cylinder is 21 cm and the curved surface area of the cylinder is 616 sq. cm, find the total surface area of the cylinder. Please help me!

Given:

Sum of the radius of the base and height of a cylinder = 21 cm

Curved surface area of the cylinder = 616 sq.cm

To find:

The total surface area of the cylinder.

Solution:

Let r be the radius of the base and h be the height of the cylinder.

Sum of the radius of the base and height of a cylinder = 21 cm

          ...(i)

Curved surface area of the cylinder is

Curved surface area of the cylinder = 616 sq.cm

Using (i), for r=7, h=14 and for r=14, h=7.

Total surface area of the cylinder is

For r=7 and h=14,

For r=14 and h=7,

Therefore, the total surface area of the cylinder is either 924 sq.cm or 1848 sq. cm.

congruent segments

step-by-step explanation:

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step-by-step explanation: