In measuring the sides of a rectangle, one side is taken 10% in excess, and the other 8% in deficit. The error percent in the area calculated from these measurements is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 1.2%.
Let actual sides be: length = L, Breadth = B
Measured length = L + 10% of L = 1.10L
Measured breadth = B - 8% of B = 0.92B
% error in area = 10 - 8 - = 2 - 0.8 = 1.2%