Question

Perimeter of a rectangle is 180 m. find its maximum area.
a. 2025m² b. 2000m² c. 1800m²​

Answer 1

Step-by-step explanation:

2(l+b)=180

l+b=90

l=90-b

now area =l×b=(b)(90-b)=

90b-b^2

=-b^2+90b