Question

The area of a rectangle is 105 square centimeters. The width of the rectangle is 7 centimeters. What is the perimeter of the rectangle?

Answer 1

44 because 105 ÷ 7 = 15.
So (7*2)+(15*2)=44

Answer 2

Answer:

44cm

Step-by-step explanation:

The information we have is:

Area: $Area=105cm^2$

width: $w= 7cm$

------------

To find the perimeter first we need to find the length of the rectangle.

We find it with the formula for the area of a rectangle:

$Area=width*length$

so clearing for length:

$length=\frac{Area}{width}$

substituting known values:

$length = \frac{105cm^2}{7cm}\\ length = 15cm$

And now we can calculate the perimeter:

$perimeter = 2(width+length)\\perimeter = 2(7cm+15cm)\\perimeter =2(22cm)\\perimeter=44cm$

the perimeter of the rectangle is 44cm