The side of the square is equal to the shorter side of the parallelogram. The ratio of the shorter side to the longer side of the parallelogram is 3: 4. The area of the parallelogram is 84cm2 and the altitude of the parallelogram on the longer side is 7 cm. Find the diagonal of the square.
1
13√2cm
2
3√2cm
3
9√2cm
4
11√2cm
5
None of these