Question

Please help me with this math question

Answer 1

W= 75 L= 115

Explanation:

3.8m= 380cm

Perimeter= 380cm

Perimeter formula: 2(L+W)

L= length W= width

The length in the problem equals 40cm more then the width. so the length equals (w+40) or (40+w). now subsitute that into the perimeter formula.

2(40+W+W)=380

Now solve for W

2(40+W+W)=380

Divide by 2 on each side, to get rid of it on the left (like below)

40+W+W= 190

subtract 40 off both sides

2w= -40+190

Divide by 2 on both sides

2w=150

W= 75

Since the width is 75, this means that the length is 40 more than 75, therfore

L= 75+40=115

Answer 2

Explanation:

Hey there!

The length is 40 cm more than breadth.

Sp let the breadth be x.

So, length will be 40+x

Now, we know that Perimeter of a rectangle is 2(Length+Breadth)

We can write that

380 cm = 2(40+x+x)

190 = 40+2x

2x = 150

x = 75 cm.

So, breadth is 75 cm.

And length is 75+40 = 115 cm.

Hope it helps:)