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Q: In measuring the sides of a rectangle, one side is taken 20% in excess and the other 10% in deficit. Find the error per cent in area calculated from the measurement ?

  • 1
    8% excess
  • 2
    9% deficit
  • 3
    12% excess
  • 4
    11% deficit
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Answer : 1. "8% excess"
Explanation :

Answer: A) 8% excess Explanation: Since  Area of Rectangle = side1 x side2Therefore, error% in area= x + y + xy100 %= [20 - 10 + ( -10 x 20)/100]% or 8% i.e. 8% excess.

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