Question

Simon has a rectangular garden that is 10 feet wide. The perimeter of the garden is 50 feet.

Answer 1

The area is 150 feet^2. The dimensions are 10x15 feet.

_________x__________
|                                       |
|                                       |
|  10 ft                              |  10 ft
|                                       |
|  ________x__________|

20+2x=50 <--- the perimeter 
30=2x
x= 15

Answer 2

The area is 150 feet.