Question

Ravi wants to cover the outer boundary of a circular flower garden

having radius 14m. Find the cost of fencing the circular flower garden at

the rate of Rs 20 per m.​

Answer 1

Answer:

circumference of the garden =2πr

=2*22/7 *14

=88 m

cost of fencing =88*20

=1760 rupees

hope it helps

Answer 2

Given:-

Radius of circular flower garden is 14 m.

Rate of fencing the circular flower garden is ₹20/m.

Solution:-

At first, We have to find perimeter of circular garden that is circumference.

So, Circumference ⇒ 2πr

                               ⇒ 2 × $\dfrac{22}{7}$ × 14 m

                               ⇒ 44 × 2 m

                               ⇒ 88 m

Now, Cost of fencing the circular garden ⇒ ( Rate of fencing × circumference of circular garden )

                                                                    ⇒ ₹20/m × 88 m

                                                                    ⇒ ₹1760

Hence, Cost of fencing the circular garden is ₹1760.

Some Important Terms:-

• Circumference of circle = 2πr

• Area of circle = πr²

• To find cost of fencing of any closed figure = ( Rate of fencing × Perimeter of the closed figure )