anup manages to draw 7 circles of equal radii with their centres on the diagonal of a square such that two extreme circles touch two sides of the square and each middle circle touches two circles on either side . find the ratio of radius of the circles to the side of the square .
diagonal of square = ( 2 * r ) * 7 + ( 2 ^ ( 1 / 2 ) * r - r ) * 2 diagonal has 7 squares diameters length + little distance between extreme squares to the end point [ form a square of side r from center of extreme circle to the extreme end to find distance ] distance = 2 ^ ( 1 / 2 ) * r - r d = a * 2 ^ ( 1 / 2 ) a = 2 ^ ( 1 / 2 ) * [ 6 * r + 2 ^ ( 1 / 2 ) * r ] r / a = 1 : [ 2 + 6 * 2 ^ ( 1 / 2 ) ] answer is none of the above answer : e
divide(sqrt(const_2), multiply(const_2, add(7, sqrt(const_2))))