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The volume and surface area of a family of regular solid shapes are related by the formula V = kA.5 where V is given

The volume and surface area of a family of regular solid shapes are related by the formula V = kA.5 where V is given in cubic units and A in square units. (a) For one such shape, A = 81 and V = 243. Find k. (b) Hence determine the surface area of a shape with volume , 64 3 3 cm

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