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Monday, March 9, 2009

Perimeter of a rectangle

Question
Rectangular garden is 85 meter long and 57 meter broad. Trees are to be planted around the garden at a distance of 5 meter having a distance of 4 meter the start. How many such trees can be planted




Solution
Procedure 1
  • compute for the perimeter of the rectangle that is available for tree planting
  • L: 85 meter - 4 meter = 81 meter
  • W: 57 meter 4 meter = 53 meter
    Procedure 2
  • The perimeter of a rectangle is computed by 2L + 2W
  • 2 (81 meter) + 2 (53 meter)
  • 162 meter + 106 meter = 268 meter
    Procedure 3
  • How many meters can be planted?
  • 268 meter / 5 meter = 53 trees

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