Answer:
Length = 29 m
Width = 29 m
Step-by-step explanation:
Let x and y be the length and width of the rectangle, respectively.
The area and perimeter are given by:

Rewriting the area as a function of x:

The value of x for which the derivate of the area function is zero, is the length that maximizes the area:

The value of y is:

Length = 29 m
Width = 29 m
Answer:
Since,
Length is 4 times Breadth
Let Breadth be x
Therefore,Length=4x
Perimeter=50m
Therefore,
50m=2(l+b)
50m=2(4x+x)
50m=2(5x)
50m=10x
x=5m.
Therefore,
Breadth=5m
Length=4x=4×5=20m
Answer:=c
Step-by-step explanation: