Question

Solve this question plsssssssss..

Answer 1

1 hectare=10000m²
A=l×b
3.75×10000=37500mtr²
37500=(3x )× (5x )
37500/15=x²
2500=x²
√2500=x
50=x

l=5x
=5×50=250mtr

b=3x
=3×50=150mtr


P=2(l+b)
=2(250+150)
=2×400=800mtr


Cost=5 per Mtr
=5×800
=rs.4000






Option b

Answer 2

Let the common ration be x.

Given length = 5x.

Given breadth = 3x.

We know that Area = Length * breadth

                                 = 5x * 3x
                              
                                 = 15x^2.



Given Area = 3.75 hectares

                    = 3.75 * 10000

                    = 37500 sq.m.



15x^2 = 37500

x^2 = 37500/15

x^2 = 2500

x = 50.


Therefore Length = 5 * 50 = 250

Breadth = 3 * 50 = 150.


We know that P = 2(l + b)

                           = 2(250 + 150)

                           = 2 * 400

                           = 800m.


Therefore the cost of fencing = 800 * 5

                                                  = 4000.


Hope this helps!