Question

The sides of a rectangular park are in the ratio 4:3.If the area is1728 m², find the cost of fencing it at the rate of Rs. 2.50/m.

Answer 1

Answer:

Step-by-step explanation:Let the sides be 4x and 3x

4x*3x=1728 m2 (given)

12x^2=1728

X^2=1728÷12=144

X=144^1/2

X =12 m

So the sides are 4*x=4*12=48m and 3*x=3*12=36 m

Cost of fencing =2(l+b) *2.50

=2(48+36)*2.50

=2(84)*2.50

=168*2.50= Rs 420