A rectangle is 15cm wide, and its length was increased by 2cm, if its new perimeter is 70cm. what is its original length? pls so

Question

4 years ago

11

lve

2 answers:

Minchanka [31] · Answer 1 · 2022-03-06T02:46:47+03:00

Answer:

14 cm

Step-by-step explanation:

If the rectangle is 15 cm wide then the total width is 30.

So we can subtract 30 from 70,

=40

If the length is increased by 2 then there is 4 more cm added to the total length.

We can do, 40-4

=38

If 38 is the total length we do 38 ÷ 2

=14

<em>The original length was 14 cm.</em>

Basile [38] · Answer 2 · 2022-03-06T04:01:07+03:00

Answer:

18cm

Step-by-step explanation:

We can set up an equation to solve this

Let's start by naming the original length before the increase x.

New length is x+2.

Formula for perimeter of a rectangle is 2L+2W=P

Plug known values in

2(x+2)+2(15)=70

Simplify

2x+4+30=70

2x+34=70

2x=36

x=18

The original length is 18cm.