You have enough paint to cover 300 square feet of fence. if the fence is 4 feet high, what length can you cover? you know the area (a = 300 ft2) and the width (w = 4 ft), but not the length. the formula would be more useful if it were rewritten to solve for the length in terms of the area and width. rewrite the formula by dividing both sides by the width. use the formula to find the length of fence (in feet) that can be painted. whats the length