How do you find surface area (just the basis)?
1 answer:
To find surface area of 3D objects, you have to know the area formulas for basic shapes. For example, the area of a circle is 
and the area of a rectangle is length times width. To find surface area of a cylinder, you will need to know both of those formulas, since the 3D shape involves both circles and rectangles.
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Your answer is: 63 is 90% of 70.
The work (if needed) is shown above :)
The work (if needed) is shown above :)