h=9cmr=10cm

The surface area of a cylinder is equal to the sum of the areas of the bases each having an area of π⋅r2, plus the area of the side. The area of the side is equal to the area of a rectangle with length 2πr (the circumference of the base) times the height.

2π⋅(radius)2+2π⋅(radius)⋅(height)

Substitute the values of the radius r=10 and height h=9 into the formula. Pi π is approximately equal to 3.14.

2(π)(10)2+2(π)(10)(9)

Raise 10 to the power of 2.

2π⋅100+2(π)(10)(9)

Multiply 100 by 2.

200π+2(π)(10)(9)

Multiply 10 by 2.

200π+20π⋅9

Multiply 9 by 20.

200π+180π

200π+180π

Add 200π and 180π.

380π(cm)2

Find the Surface Area cylinder (9cm)(10cm)