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1. |
Four circles having equal radii are drawn with centres at the four corners of a square. Each circle touches the other two adjacent circles. If the remaining area of the square is 168 cm2, what is the size of the radius of the circle ? (in centimetres) |
A. | 4 centimetres |
B. | .4 centimetres |
C. | 5 centimetres |
D. | 1 centimetres |
Answer» B. .4 centimetres | |