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Another four-leaf clover also consists of 4 coplanar circles. The large circular leaves are externally tangent to each other, as well as to each of the smaller circular leaves, which are also congruent to one another. The radius of the large and small circular leaves is 1 1/2 inches and 1 inch, respectively. What is the area of a rhombus formed such that each of its vertices is also the center of one of the four circular leaves?

A man distributed 50 circular plates radius 7cm. To avoid rusting of them he electroplated them on both the sides at the rate of paise 50 per sq.cm. Find the expenditure of electrolpating

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