18. The adjoining diagram shows a model of a rocket
consisting of a cylinder surmounted by a cone at one
end. The dimensions of the model are : common radius
3cm, height of cone = 4 cm and total height = 14 cm. If
the model is drawn to a scale of 1:500, find
( the total surface area of the rocket in a πm2.
(i) the total volume of the rocket in a πm3.
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