Question

the side of a rectangle are in the ratio 3:2 . if the area is 486sqm find the cost of fencing it at 40 per metre.​

Answer 1

Side of rectangle=3:2

length of rectangle =3x

breadth of rectangle=2x

Area of rectangle=lb

486=3x.2x

486=6x square

486/6=x square

81=x square

x=root81

x=9

subtituting x value

Length of rectangle =3 into 9=27

Breath of rectangle =2 into 9=18

Perimeter of rectangle =2(l+b)

=2(27+18)

=90m

Fencing cost per meter =40

Fencing cost=40 into 90

=3600

So cost of fencing is 3600

Answer 2

Answer:

Cost of fencing It at 40 per metre- 3600 Rs