Question

20. The length of a rectangular plot is 20 m more than its breadth. If the cost of fencing the plot at the rate of 26.50 per metre is *5300, what is the length of the blueplot in metres? word inbib​

Answer 1

Answer:

let the breadth be x

then length=x+20

perimeter=2(x+x+20)=4x+40

26.50(4x+40)=5300

106x+1060=5300

106x=5300-1060

106x=4240

x=4240/106

x=40

breadth =40m

length =40+20=60m

Answer 2

Let length=l breadth=b

l=b+20

Perimeter of plot=2(l+b)

=2(2b+20)

=4b+80

Now,

26.50×(45+80)=5300

10

26.5

×4b+

10

265

×80=5300

106b=3180

b=30

⇒ length=50m