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Easy

Question

If Area of a rectangle is 400 and length is 20, find its perimeter.

  1. 100cm
  2. 40cm
  3. 60cm
  4. 80 cm

The correct answer is: 80 cm


    Area of rectangle = L * B
    400 = 20 *B
    400/20 = B
    20 = B
    Perimeter of rectangle = 2*(L+B)
    =2 * (20 +20)
    =2 * 40
    =80 cm

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