Question

if the radius of a circle is 7m find its cost of fencing at rs 10 per meter​

Answer 1

Answer:

440 rupees ;)

Explanation:

okay! So we have

r= 7 m

hence, circumference= 2 pie r

                                    =2*22/7*7

                                    =44 m

now the cost

rupees 10/ m

so the total cost will be= 44*10

                                      =440 rupees

there's your answer hope it helped lmao i ain't sure tho if there's anything you feel wrong abt this let me know hahah

Answer 2

Given :-

• Radius of the Circle = 7m
• Cost of Fencing = Rs 10 per metre

To Find :-

• Total Cost of Fencing.

Solution :-

❏ As we know that, fencing is done on the boundary , so here we have find the Circumference / Perimeter of the Circle and we also know that Circumference of Circle is given by 2πr.

Putting the Values :

➞ Circumference of Circle = 2πr

➞ Circumference of Circle = 2 × 22/7 × 7

➞ Circumference of Circle = 2 × 22

➞ Circumference of Circle = 44m

________________

⟾ Cost of Fencing 1m = Rs 10

⟾ Cost of Fencing 44m = 10 × 44

⟾ Cost of Fencing 44m = Rs 440

Thus Total Cost of Fencing is Rs 440

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★ Additional Info :

Formulas Related to Circle :

• Circumference of Circle = 2πr
• Area of Circle = πr²
• Diameter of Circle = 2r
• Radius of Circle = D/2

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