Question

what is the length of a rectangle if its width is 7 ft and it's area is 84 square feet.A.6 feetB.12 feetC.8 feetD.10 feet

Answer 1

Given, width, w=7 ft.

Area, A=84 square feet.

The area of rectangle is given by,

`A=l* w`

Here, l is the length of the rectangle.

Put w=7 and A=84 to find l.

`\begin{gathered} 84=l*7 \\ (84)/(7)=l \\ 12feet=l \end{gathered}`

Therefore, the length of the rectangle is 12 feet.

Hence, option B is correct.