A hemi-spherical bowl is made of steel which is 0.5 cm thick. The inner radius of the bowl is 4cm. Find the volume of steel used in making the bowl.
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A hemi-spherical bowl is made of steel which is 0.5 cm thick. The inner radius of the bowl is 4cm. Find the volume of steel used in making the bowl.
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Inner radius = 4cm
outer radius = 4+0.5 = 4.5cm
volume of steal = 4/3π(4.5³-4³)/2 = 2/3π(91.125 - 64) =2/3π(27.125) = 56.78