anonymous
  • anonymous
The perimeter of a rectangle is 96 ft. The ratio of its length to its width is 7 : 5. What are the dimensions of the rectangle? A. 30 ft by 18 ft B. 28 ft by 20 ft C. 24 ft by 24 ft D. 22 ft by 26 ft
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
@madhu.mukherjee.946 @hartnn
midhun.madhu1987
  • midhun.madhu1987
Perimeter of Rectangle P = 2 * ( l + b ) Let length, l = 7x and Breadth, b = 5x P = 2 * ( l + b ) 96 = 2 * ( 7x + 5x ) Solve for x. Then Find length and breadth.
anonymous
  • anonymous
i'm getting C is that right?

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midhun.madhu1987
  • midhun.madhu1987
Can you let me know how you got that answer?
anonymous
  • anonymous
7x+5x=12x*2=24
midhun.madhu1987
  • midhun.madhu1987
96 = 2 * ( 7x + 5x ) 12x * 2 = 96 24x = 96 What is the value of x?
anonymous
  • anonymous
do you divide?
anonymous
  • anonymous
no you dont ok
anonymous
  • anonymous
i'm still confused on what to do next?
midhun.madhu1987
  • midhun.madhu1987
24x = 96 Divide both sides by 24. What you get?
anonymous
  • anonymous
1 and 0.25
midhun.madhu1987
  • midhun.madhu1987
24x = 96 so, x = 96 / 24 = 4 we got the value of x = 4. Now find length = 7x = 7 * 4 = 28 Breadth = 5x = 5* 4 = 20
anonymous
  • anonymous
ohhh ok it was B all along
midhun.madhu1987
  • midhun.madhu1987
yep :)

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