The diagonal of a square is 4 ?2 cm. What will be the diameter of another square if their area is double that of the first square?	Choose the most appropriate option:
A) 8 cm
B) 9 cm
C) 10 cm
D) 11 cm
E) 12 cm

Rationale: d 1 = 4 ? 2 = > area = 1 / 2 d 12 = 1 / 2 * ( 4 ? 2 ) 2 = 16 cm 2 area of new square = ( 2 * 16 ) cm 2 = 32 cm 2 therefore 1 / 2 * d 22 = 32 = > d 22 = 64 = > d 2 = 8 cm answer a
Answer: A