Question 442160: how would you find the width of a rectangle if all you have is the area?
Answer by wilft1(217)   (Show Source):
You can put this solution on YOUR website! area=2L+2W
this applies for squares as well as rectangles
if we have an area of say... 125
if all you have to go off of is just the area, then you can have an almost infinite number of possibilities for the exact dimensions, but i'll show you how to zero in on a single solution
say that the length is 5 units longer than the width
that would make the equation 2L+2W+10=125
i put the 10 in there because remember, you have 5 on both sides, so lets solve this...
lets change the l and w to x's
2X+2X+10=125
subtract 10 from both sides
2X+2X=115
comebine like terms
4X=115
divide by 4 on both sides
x=28.75
we now have 4 equal sides, but wait, we still have to add +5 to the length
so, your length is 33.75
and your width is 28.75
lets check our work
2(33.75)+2(28.75)=125
thats how ya do it
|
|
|
