SOLUTION: what is the positive or negative percentage change in the area of a rectangle when the base is increased by 10% and the height increased by 20%?

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Question 218493: what is the positive or negative percentage change in the area of a rectangle when the base is increased by 10% and the height increased by 20%?
Found 2 solutions by tlouvierre, checkley77:
Answer by tlouvierre(4) About Me  (Show Source):
You can put this solution on YOUR website!
The base is multiplied by 1.1
The height is multiplied by 1.2
The area = b*1.1*h*1.2
Area is multiplied by 1.32
The increase is 32%

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
AREA=BH/2
(1.1B)(1.2H)/2
1.32BH/2 OR A 32% INCREASE IN AREA.