The silo has a cylindrical shaped base topped by a half sphere.
Calculate the surface area of the silo to the nearest tenth of a square metre if the diameter of the base is 10 metres and the height of the cylinder is 30 metres.
The farmer intends to purchase large cans of paint that each covers 400 ft2 of surface area. If 1 m2 = 10.764 ft2, estimate how many cans of paint he will need to paint the silo.
Calculate the surface area of the silo to the nearest tenth of a square metre if the diameter of the base is 10 metres and the height of the cylinder is 30 metres.
The farmer intends to purchase large cans of paint that each covers 400 ft2 of surface area. If 1 m2 = 10.764 ft2, estimate how many cans of paint he will need to paint the silo.
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Well,
You have to find the area of the side of the cylinder which is circumference times height.
Recall circumference 2*pi*r where r=radius which is half the diameter.
The top part is half a sphere which has area 4*pi*r^2 (remember to be careful with radius and to take half of this).
When you add together you get total area.
Multiply by 10.764 to get in ft^2, then divide by 400 to see how many cans of paint to buy.
Remember to round up! The farmer can't buy parts of paint cans.
You have to find the area of the side of the cylinder which is circumference times height.
Recall circumference 2*pi*r where r=radius which is half the diameter.
The top part is half a sphere which has area 4*pi*r^2 (remember to be careful with radius and to take half of this).
When you add together you get total area.
Multiply by 10.764 to get in ft^2, then divide by 400 to see how many cans of paint to buy.
Remember to round up! The farmer can't buy parts of paint cans.