Question

If the side of a triangle is increased by 25%, then what is the percentage increase ment in area?​

Answer 1

Answer:

If a variable X changes by A% and another variable Y changes by B%, then overall net change when the two variables are multiplied is given by :

A + B + AB/100

If the change is “increase” it is positive & if the change is “decrease” it is negative.

In the given question, A = B = 25% ( Both positive as length increase )

And area = Side x Side

Applying our versatile relation :

Net increase in area = 25 + 25 + (25x25)/100 = 56.25%

Answer 2

Answer:

When you increase the side length by 25% then it's new length is 1.25s an the new area is(1. 25s)2 =1.5625s

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