Question
A rectangle has a length of 7n m and a breadth of 4y m. Find
  1. its area in terms of n and y,
  2. its perimeter in terms of n and y,
  3. the area of the rectangle if n = 5 and y = 7.
4 m
(a)

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(b)

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(c)

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A rectangle has a length of 7n m and a breadth of 4y m. Find
  1. its area in terms of n and y,
  2. its perimeter in terms of n and y,
  3. the area of the rectangle if n = 5 and y = 7.