SOLUTION: A rectangle of dimensions 8 cm*6 cm has a border of width 1.5 cm all around it.find the area of the bigger rectangle and hence the area of the border alone.

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Question 998774: A rectangle of dimensions 8 cm*6 cm has a border of width 1.5 cm all around it.find the area of the bigger rectangle and hence the area of the border alone.
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
Rectangle area, 8%2A6%2Acm%5E2;
Including the border, total area, %288%2B2%2A1.5%29%286%2B2%2A1.5%29%2Acm%5E2.

The difference is the border area alone.
This is why those two number expressions were not computed:
%288%2B2%2A1.5%29%286%2B2%2A1.5%29-8%2A6
%288%2B3%29%286%2B3%29-8%2A6
8%2A6%2B3%2A8%2B3%2A6%2B9-8%2A6----presence of additive inverse
3%2A8%2B3%2A6%2B9
3%288%2B6%29%2B9
3%2A14%2B9
42%2B9
highlight%2851%29------area of the border

You can go back and compute the total border plus rectangle area.