Question

The radius of a circular field is 210 m .The cost of fencing its circumference at the rate of Rs 125 per metre is *

a. Rs 1600

b. Rs 165000

c.Rs 175000

d. Rs 170000​

Answer 1

$\huge{\boxed{\bf{\pink{\underline{\orange{Required\: Answer→}}}}}}$

Option " B " is correct ✓

Cost of fencing of given circle = ₹ 165000

Explanation →

$\huge{\bf{\underline{\underline{\green{GiveN ☞}}}}}$

• Radius of Circle = 210m
• Cost of fencing is ₹125/m

$\huge{\bf{\underline{\underline{\green{To\: FinD☞}}}}}$

• Circumference of Circle
• Cost of fencing of Circle

$\huge{\boxed{\bf{\underbrace{\red{Formula\:UseD→}}}}}$

Circumference of Circle = 2πr

Where,

• π = $\frac{22}{7}$
• r = radius of Circle

$\huge{\bf{\underline{\underline{\green{Solution☞}}}}}$

Finding Circumference of Circle ☞

Substituting values in the given formula

Circumference of Circle = 2πr

=> $2 \times \frac{22}{ 7} \times 210$

=> $2 \times 22 \times 30$

=> $\large{\bf{\pink{\boxed{1320m}}}}$

Hence the circumference of Circle = 1320m

Finding cost of fencing ☞

Cost of fencing of 1 m = ₹125

Therefore,

Cost of fencing of 1320m = 1320×125

=> $\large{\bf{\pink{\boxed{₹165000}}}}$

Final answer --

Cost of fencing = ₹ 165000

Answer 2

Answer:

the above ans is absolutely crct