The diagonals of two squares are in the ratio of 2 : 5. Find the ratio of their areas. Choose the correct choice.
A) 3:7  B) 2:7  C) 3:5  D) 5:2  E) 4:25
Let the diagonals of the squares be 2x and 5x respectively.   Ratio of their areas = (1/2)*(2x) 2:(1/2)*(5x) 2   = 4x2: 25x2   = 4 : 25.   Ans: 4:25
<result>E</result>
The diagonals of two squares are in the ratio of 2 : 5. Find the ratio of their areas.