Question

How many square inches of tin are needed to make the top of a can that is 10 inches in diameter?

Answer 1

hint: area of a circle is

A = pi*r^2

where

A = area
r = radius
pi = 3.14 (approximately)

Answer 2

remember that

d = 2*r

where

d = diameter
r = radius

Answer 3

So, Khmer, try putting this all together to determine the area of the can top if the diameter of the can top is 10 units.