Question

the diameter of a circular Park is 24 m a 3 metre wide path runs around it from inside find the cost of a paving the path at rupees 25 per metre square​

Answer 1

Answer:

Since the Diameter= 24m. The Radius will be = D/2= 24/2 = 12m.

It is given that a 3m wide path runs around it from 'inside'. Therefore, the Radius of the bigger circle will be 12-3= 9m

Area of bigger circle= pi r²

= 22/7 * 12 * 12 = 452.57m²

Area of smaller circle = pi r²

= 22/7 * 9 * 9 = 254.57m²

So the area of path= Area of bigger circle- Area of smaller circle

= 452.57- 254.57

= 198 m²

The total cost= 198* 25= Rs. 4950