SOLUTION: If the length of a rectangle is increased by 40% and the breadth is reduced by 20%, what will be the effect on its area?

Question 1089677: If the length of a rectangle is increased by 40% and the breadth is reduced by 20%, what will be the
effect on its area?
Found 3 solutions by math_helper, rothauserc, MathTherapy:
Answer by math_helper(2461)   (Show Source): You can put this solution on YOUR website!

A = L*W
If L' = 1.4L and W' = 0.8W then A' = (1.4L)*(0.8W) = 1.12A
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The new area is 12% greater than the original.
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Answer by rothauserc(4718)   (Show Source): You can put this solution on YOUR website!
Area = l * w, l is length and w is width
:
new area = (l +0.40l) * (w -0.20w)
:
new area = lw +0.40lw -0.20lw -0.08lw
:
new area = lw +0.12lw
:
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the new area increases by 0.12 or 12%
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:

Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

If the length of a rectangle is increased by 40% and the breadth is reduced by 20%, what will be the
effect on its area?

New area = 1.12LB, so effect is:
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