Question

a farmer has a circular feild whose area is 15400m2.find the length of the wire needed​

Answer 1

Step-by-step explanation:

area of the feild = 15400 m2

volume of the feild = a2

15400 = a2

a = √15400

Answer 2

Answer:

440 cm wire needed

Step-by-step explanation:

As we know that

Area of circle with radius r is πr

2

Let the radius of the circle be r cm

Given Area of a circle is 15400 cm

2

⟹πr

2

=15400

⟹

7

22

×r

2

=15400

⟹r

2

=(70)

2

⟹r=70

As we know that

Circumference of circle with radius r is 2πr

So circumference of circle is 2π(70)=2×

7

22

×70=440 cm