Question

A rectangle has a length of 10 ft and a width of 6 feet what's the perimeter

Answer 1

The perimeter of a rectangle is given by (l is length, w is width):
$P = 2(l + w)$

Plug in the values:
$P = 2(10+6) = 2(16) = 32$

So, the perimeter of the rectangle is 32ft.