Question : If the diagonals of a rhombus are 8 cm and 6 cm, then the square of its side is:

Option 1: $25\;\mathrm{cm^2}$

Option 2: $55\;\mathrm{cm^2}$

Option 3: $64\;\mathrm{cm^2}$

Option 4: $36\;\mathrm{cm^2}$

Question : The area of a rhombus is 256 square cm, and one of its diagonals is twice the other in length. The length of its larger diagonal is:

Option 1: 32 cm

Option 2: 16 cm

Option 3: 48 cm

Option 4: 24 cm

Question : Three cubes of iron whose edges are 6 cm, 8 cm, and 10 cm, respectively, are melted and formed into a single cube. The edge of the cube formed is:

Option 1: 12 cm

Option 2: 14 cm

Option 3: 16 cm

Option 4: 18 cm

Question : Two concentric circles are of radii 10 cm and 6 cm. Find the length of the chord of the larger circle which touches the smaller circle.

Option 1: 8 cm

Option 2: 16 cm

Option 3: 12 cm

Option 4: 9 cm

Question : The lengths of the diagonals of a rhombus are 24 cm and 10 cm, then the perimeter of the rhombus (in cm) is:

Option 1: 52

Option 2: 56

Option 3: 68

Option 4: 72