The length and breadth of a rectangle are increased by 10% and 15% respectively. again, the new length is decreased by 20%. the net change in the area of the rectangle is:
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Answered by
6
let's take length and breadth be 100 each
therefore the 10%increase 110 and 15%increase is 115 therefore total area =12650
now decrease 20% therefore length will be 92 so area is 10120
difference is 2530
%decrease is 20%
therefore the 10%increase 110 and 15%increase is 115 therefore total area =12650
now decrease 20% therefore length will be 92 so area is 10120
difference is 2530
%decrease is 20%
Answered by
8
Answer:
The net increase in area is 1.2%.
Step-by-step explanation:
Let the length and width of the rectangle be l and w respectively.
The area of the rectangle is
The length and breadth of a rectangle are increased by 10% and 15% respectively.
Again, the new length is decreased by 20%.
Now the new length is 0.88l and the new width is 1.15w.
The net change in the area is
Therefore the net increase in area is 1.2%.
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