posted by samantha on .
a rectangle is twice as long as it is wide. if both of its dimensions are increased by 4m, its area is increased by 88m^2 find the dimensions of the original rectangle
Original rectangle = w for width and 2w for length. Area = w x 2w
Larger rectangle = w+4 for width and 2w+4 for length. Area = (w+4)*(2w+4)
The problem states that the larger rectangle has an area that is 88 m2 more than the original.
Put that in equation form.
area of rectangle 2 - area of rectangle 1 = 88.
Solve for w. The length will be twice that. Post your work if you run into trouble.