The volume of a frustum of a cone of height h is given by the formula
V = 1/3πh(R² + Rr + r²),
where R and r are the radii of it's circular ends.
Hollow metal hemispheres of internal and external diameters 12.5 cm and 17.5 cm, respectively, are to be cast from the molten contents of a ladle in the shape of a frustum of a cone of depth 1.2 meters and radii of ends 0.6 m and 0.675 m. Calculate the number of hemispheres that can be cast. [WAEC]?
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Asked by Kill you here on 22nd May, 2020
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