Question

The length of a rectangle is increased by 60% and its width remains the same. what is the ratio of the new area to the old area of the rectangle?select one:

Answer 1

Let the initial length be “ l ”
Initial Breadth be “ b
Now, Area = lb

Given length is increased by 60% = l+60% of l =l +3/5 l =8/5 l

Now area = 8/5 l * b = 8/5 lb


Ratio of Areas = lb: 8/5 lb = 1:8/5 =5:8.

the ratio of the new area to the old area of the rectangle is 5:8.