Math, asked by muhammadawaisshiekh2, 10 months ago

a circular park of a radius 12 meters has a road 4 meters wide running round it.find the cost of metalling the road at the rate of rs 600 per sq.meter

Answers

Answered by knjroopa

Step-by-step explanation:

Given A circular park of a radius 12 meters has a road 4 meters wide running round it.find the cost of metalling the road at the rate of rs 600 per sq.meter

Given a circular park with radius OA = 12 m
So 4 m wide road around park
So radius of outer circle OB = OA + AB
= 12 + 4
= 16 m
We know that Area of circle = π r^2
So area of road will be area of outer circle – area of inner circle
= π (OB^2 – OA^2)
= π (16^2 – 12^2)
= π (256 – 144)
= 2464 / 7 m^2
Now cost of metalling the road per square meter is Rs 600
Therefore cost for 2464 / 7 m^2 will be 2464 / 7 x 600

= Rs 2,11,200

Reference link will be

https://brainly.in/question/1798404

# BAL

Answered by amir3435984

Answer:

211200 is right answer

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