Class VII

If the perimeter of a semicircular protractor is 36 cm, find the diameter.
  1. None of these
  2. 24
  3. 14
  4. 36
The circumference of a circle of radius 5 cm is
  1. 10π
  2. 15π
  3. 20π
The value of π is _____ approximately
  1.  3.14159
  2.  3.4159
  3.  3.15149
  4.  3.51419
If the area of the rectangle is 105 cm2. Its length is (4x – 5) cm and breadth is (2x – 5) cm, find the perimeter?
  1. 66 cm
  2. 40 cm
  3. None of these
  4. 60 cm
The perimeter of regular polygon is
  1. No. of sides + lengths of one side
  2. No. of sides ×lengths of one side
  3. None of these
  4. No. of sides - lengths of one side
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