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The width of the rectangles is 50% its length. Given that the perimeter of 3 such rectangles is 90 cm, find the length of 1 rectangle.

 May 1, 2021
 #1
avatar+199 
+2

If the perimeter of 3 rectangles is 90cm, the perimeter of 1 is 30.

If the width of the rectangle is x, than the whole rectangle would be 6 x.

30=6x, so x=5

 

the length of one rectangle is 10 

 

 

 

 

 

your welcome :)

 May 1, 2021
edited by mathisopandcool  May 1, 2021
 #2
avatar+199 
+2

sorry I didnt explain it in too much detail I didnt have much time.

 

I hope you understand it.

mathisopandcool  May 1, 2021
 #3
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0

Your explanation sucks

Guest May 1, 2021
 #4
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0

And no i did not understand a single thing

Guest May 1, 2021
 #5
avatar+199 
+1

This might be a better visual that made!

 |------------|

 |               |

 |30, or 6x |    x

 |              |

 |              |

 |------------|

      2x

mathisopandcool  May 1, 2021
edited by mathisopandcool  May 1, 2021
 #6
avatar+199 
+1

;-; is it THAT hard i try to be nice but ....

mathisopandcool  May 1, 2021
 #7
avatar+742 
+2

Honestly, I think @mathisopandcool's solution is nice and clear enough. @guest, it is not his/her fault if YOU can't understand a thing. Why are you being rude?

 #8
avatar+742 
+1

The width of the rectangles is 50% its length. Given that the perimeter of 3 such rectangles is 90 cm, find the length of 1 rectangle.

 

Let l be the length

Let w be the width

 

w=1/2 l (1)

2(l+w) * 3 = 90 (2)

Simplifying (2): 2l+2w=30

l+w=15 (3)

(1) & (2) : 3/2 l = 15

1/2 l = 5

L = 10

 

 

Length is 10.

 

Enjoy you ungrateful guest.


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