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 €3 per metre.​

Answer 1

Answer:

546 rs

Step-by-step explanation:

let the sides be 4x and 3x

area = 2028 sq. cm

4x *  3x = 2028

12x² = 2028

x² = 169

x = 13

sides => 4 x 13 = 52 cm

=> 3 x 13 = 39

perimeter = 2 x (39 + 52)

= 2 x 91

= 182 cm

cost of fencing = 3 x 182

= 546 Rs.

Answer 2

Step-by-step explanation:

let the sides be 4x and 3x

therefore

4x*3x=2028

12x^2=2028

x^2=2028/12

x=√169

x=13

therefore sides= 4x and 3x

that is 52m and 39m

perimeter of the park =2*(l+b)

= 2*(52+39)

=182 m

therefore cost of fencing 182 meter =182*3

=€ 546