Question 616279: a toolroom 21 feet by 18 feet was enlarged to the dimensions of 24 feet by 20 feet.How many square feet of floor space was added? Answer by dragonwalker(73) (Show Source):
You can put this solution on YOUR website! Work out the area before and after by multiplying the length by the width for each room size.
So for the smaller room:
a = 21 x 18
= 378 sq ft
and for the larger room
A = 24 x 20
= 480 sq ft
So the difference is the area of the larger room minus the area of the smaller room:
Area difference = A - a
= 480 - 378
= 102 sq ft
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