pragya donates toys to children of an orphanage on the occasion of her birthday. each toy is in the shape of a cone mounted on a hemisphere of common base radius 7cm. the total height of the toy is 31cm. find total surface area of toy. also find the cost of 50 such toys if cost of material used for coloring the toys is RS. 5 per 100cm^2 and cost of manufacturing is RS. 10 per toy.
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