Question

The sides of a rectangular park are in the ratio 4:3. If its area is 2028 sq.m, find the cost of fencing it at rupees.3 per metre.

Answer 1

Step-by-step explanation:

let the length of a rectangular park 4x

Answer 2

Answer:

let the length and breadth of the park be 4x and 3x respectively.

Now,

According to question,

area of park =lxb

=2028=4x.3x

=2028=12x^2

=x^2=2028/12

=x^2=169

=x=√169

=x=13

so,

length=4x=4x13=52

breadth=3x=3x13=39

Now,

perimeter =2(l+b)

=2x(52+39)

=2x91

=182

cost of fencing=182x3=₹546