The length of a rectangle is increased by 50% and the width
is doubled to form a larger rectangle with an area of 30 cm².
What is the largest possible perimeter of the larger rectangle
if and are integers with ?
The new rectangle has length and width .
Its area is 30 cm²: .
Since and are integers with
. . there are only two possible cases:
The largest perimeter is 22 cm . (A)