Question: the perimeter of one square is 48 cm and that of another is 20 cm . find the perimeter and the diagonal of a square which is equal in area to these two combined ?
A)  5 cm
B) 13 √ 2 cm
C)  12 cm
D)  6 cm
E)  8 cm
Correct answer: b
Grade: 7 | Topic: Geometry | Difficulty: Hard | Standard: 7.G.B.6