If the length is twice the width, means length is : [tex]2\quad \times \quad 5\quad =\quad 10[/tex]
To find the area multiply the width and length :[tex]10\quad \times \quad 5\quad =\quad 50[/tex] . The air mattress' area is [tex]3\quad \times \quad 6\quad =\quad 18[/tex] We should substract the air matress' field from the tent's : [tex]50\quad -\quad 18\quad =\quad 32[/tex] The answer is 32 square feet.
