Question

How do you find the maximum area of a rectangle with perimeter of 40 ft?

Answer 1

given perimeter equals to 40

2(l+b)=40

l+b=20

values of l=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

b=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

l+b value =

1+19

2+18

3+17

4+16

5+15

6+14

7+13

8+12

9+11

10+10

11+9

:

:

the maximum area is 100sq.ft

please make it as brailist answer