Our pool is twice as long as it is wide and is surrounded by a walkway of uniform width of 1 foot. The combined area of the pool and walkway is 400 square feet. Determine the dimensions of the pool and
the area of the pool.

Ahmed plans to add a rectangular sunroom to his house. the sunroom will have a length of 14 feet and a width of 10 feet, and the construction will cost $40 per square foot. how much more would the sunroom cost if it’s width were increased to 12 feet?