Question

The formula for the perimeter, P, of a rectangle is P = 2(1 + w),

Answer 1

Answer:
You he length of the rectangle is:
155 cm

Answer 2

Answer:

$l=155cm$

Step-by-step explanation:

Given the following question:

$P=2(l+w)$
$P=400cm$
$w=45cm$

In order to find the length of the given rectangle complete the following steps.
$400\div2=200$
$200-45=155$
$l=155cm$

Check your work:
$P=2(l+w)$
$l=155$
$w=45$
$P=2(155+45)$
$155+45=200$
$2\times200$
$2\times200=400$
$p=400cm$

Hope this helps.