Question 316142
Find the surface area for both objects. 
Then, using the surface area and cost per area of painting both objects, calculate the total cost to paint each.
For a sphere,
{{{SA=4*pi*r^2}}}
{{{SA=4*pi*(2/2)^2}}}
{{{SA=4*pi}}} pr approximately
SA(sphere)=12.6 m^2
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For a cube, each face is a square and there are 6 faces.
{{{SA=6s^2=6(4)}}}
{{{SA=24}}}
SA(cube)=24 m^2
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You don't even have to calculate the total cost.
The cost of the paint is the same so the cost of painting the cube is almost double the cost of painting the sphere becasue the cube has almost double the area of the sphere.