Question
A rectangle has a length of 6n m and a breadth of 2r m. Find
  1. its area in terms of n and r,
  2. its perimeter in terms of n and r,
  3. the area of the rectangle if n = 2 and r = 6.
4 m
(a)

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(b)

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(c)

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A rectangle has a length of 6n m and a breadth of 2r m. Find
  1. its area in terms of n and r,
  2. its perimeter in terms of n and r,
  3. the area of the rectangle if n = 2 and r = 6.