Question

a park of lengh and breath 3:1 . and its perimeter is 320mts. 2mts thuck road is made in the inner side of park. find the total cost of making the road if the cost of making is 1.50 per meters?

Answer 1

(3x+x)2=320
4x=320/2
x=160/4
x=40
length=3x=40*3=120
bradth=x=40
area=2*120=240 sq.m.
240*1.5=360