The sun roof in Troy’s house is shaped like a rectangle. He increases the length of the sides of the sun roof to three times the existing ones. How will this change affect the perimeter of the sun roof?

Question

The sun roof in Troy’s house is shaped like a rectangle.  He increases the length of the sides of the sun roof to three times the existing ones. How will this change affect the perimeter of the sun roof?

anonymous · Answer

Help please

anonymous · Answer

@uri

uri · Answer

LOL,sorry.

anonymous · Answer

@apoorvk

anonymous · Answer

It will be 12 times the original perimeter. 

 It will be 3 times the original perimeter. 

 It will be 18 times the original perimeter. 

 It will be 9 times the original perimeter

apoorvk · Answer

okay, so he increases the length and makes it three times.

perimeter originally = 2(l+b)

now 'l' becomes '3l', so what will be the new perimeter?

anonymous · Answer

2(31 + b)?

apoorvk · Answer

yeah exactly!

anonymous · Answer

so which answer would it be? i think its the last one

apoorvk · Answer

No, it would not necessarily a multiple of the previous perimeter - since the breadth is not known.

apoorvk · Answer

Wait - did you actually mean 'area' instead of 'perimeter'?

anonymous · Answer

no thats what the question states