Question

The length of a rectangle increases by 6% while its breadth decreases by 5% .the area would increase /decrease by

Answer 1

If Length of a rectangle is increased by 20% and width is decreased by 20% , then area will be ? 

Let length = L, and width = W
Then, original area = LW 


Increasing length by 20% makes the new length 1.2L
Decreasing width by 20% makes the new width .8W
New area = 1.2L(.8W), or .96LW 

This means that the area would DECREASE by 4% (LW - .96LW)