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How many circular plates of diameter d be taken out of square plate of side 2d with minimum loss of material?
The area of a circle is increased by 22 sq cm when its radius is increased by 1 cm. Find the original radius of the circle?
What is the ratio of areas of circumcircle and the incircle of a square?
Find the area of a square inscribed in a circle of radius 5 cm ?
Why USSR was demolished ?
Why USA is a economic power in the world?