Question

given rectangle with a fixed perimeter of 24 metres if we increase the length by 1 metre bridge and the area will vary accordingly

Answer 1

let breadth=x

length=y+1

perimeter=24 m

2(y+1+x)=24

2(x+y+1)=24

x+y+1=12

x+y=11

x=11-y

Area=l×b

=(y+1)×x

=(y+1)×(11-y)

=11y+11-y^2 -y

=11+10y-y^2 Ans.