Mathematics
Grade10
Easy

Question

The length of a rectangle is 3 more than its breadth. If the perimeter of the rectangle is 2b + 9, find the breadth of the rectangle.

  1. 2 over 3
  2. 2
  3. 3 over 2
  4. 5

Hint:

Let the breadth of the rectangle be b.
Length = 3 + b
Perimeter of rectangle = 2 (b + 3 + b)

The correct answer is: 3 over 2


    Let the breadth of the rectangle be b.
    Length = 3 + b
    Perimeter of rectangle = 2 (b + 3 + b)
    2b + 9 = 2 (2b + 3)
    2b + 9 = 4b + 6
    9 - 6 = 4b - 2b
    2b = 3
    b = 3 over 2

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