Solve for x and calculate the lengths of the sides of the triangle, width of the rectangle, and Juzi and Leo's money.

Side 1: $x - 5 = 11.25 - 5 = 6.25 \text{ cm}$
Side 2: $x - 5 = 11.25 - 5 = 6.25 \text{ cm}$
Side 3: $2x + 5 = 2(11.25) + 5 = 22.5 + 5 = 27.5 \text{ cm}$
The lengths of the sides of the triangle are $\boxed{\text{6.25 cm, 6.25 cm, and 27.5 cm}}$.

B.

Substitute the given perimeter and expressions for length and width:

The width of the rectangle is $\boxed{\text{8 cm}}$.

C.

Leo has $2y = 2 \times 250 = 500$.
Leo has $\boxed{\text{sh. 500}}$.