# Pasagot po ng math ko

28 sec read

Pasagot po ng math ko

## ✒️FINDING SURFACE AREA

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Find the surface area of the cylinder? Where ​ ≈ 3.14

• 904.32 square yards

Surface area of a cylinder:

• Surface area =

Find the radius and height of the cylinder.

• radius = 9
• height = 7

Find the area of the circle on the top of the cylinder. Use 3.14 for ​.

= r²

• ≈ 3.14 × 9 × 9
• ≈ 254.34

The circle on the bottom of the cylinder is the same on the top, so:

• ≈ 254.34

Find the circumference of the top circle.

C =  2​r

• ≈ 2 × 3.14 × 9
• ≈ 56.52

Now find the area of the curved surface. The curved surface is a rectangle. One side length is the height, and the other side length is the circumfrence of the circle.

Aside = C × h

• ≈ 56.52 × 7
• ≈ 395.64

Now add the areas to find the surface area of the cylinder.

Surface area

• =
• ≈ 254.34 + 254.34 + 395.64
• ≈ 904.32

The surface area of the cylinder is about 904.32 square yards.

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