An ultra modern spa is to be installed at the rear of the entertainment area. It's in the shape of a hemisphere and has the maximum depth of 1.5 meters.Before the spa is filled ,it needs to be waterproffed with a paint on sealer.A 2 Lirte can of sealer covers an area of 12m2.
a) Determine the internal surface area of the spa to be sealed.
b)How many 2 litre cans of sealer would be needed to complete the job if three coats of sealer are needed?
c)What is the volume of water required to completely fill the spa?