In measuring the sides of a rectangle, one side is taken 8% in excess, and the side is taken 5% less. Find the percentage of change in Area.
a) 2.6% b) 13% c) 3% d) 2.75% e) 9%
a) 2.6% b) 13% c) 3% d) 2.75% e) 9%
Answers and Explanations are welcome in comments
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Answer and Explanation for Question no. 10
ReplyDeleteCorrect Answer is - 2.6%
Explanation : There is shortcut to Calculate these types of Question
If you found % changes two times you can use the simple formula
That is = a+b+(ab/100)
(Where a and b are % changes, Take positive Signs for increase and Negative signs for decrease)
+8-5+(-40/100) = 3-.4 = 2.6%