find the cost of developing 6m wide road at outer side of circular garden having 14m radius at a rate of Rs 70 per m²
Answers
Answer:
Radius of the circular garden is 14 m (R)
Radius of the circular garden after the road (14 + 6) m = 20 m (r)
Area of a circular Garden including the road = πr²
= 3.14 X 20 X 20
= 1256 m²
Area of the circular garden without the road = πR²
= 3.14 X 14 X 14
= 616 m²
Area of the road = Area of a circular Garden including the road - Area of the circular garden without the road
= 1256 = 616 = 640 m²
Cost of making road per m² = ₹ 70
Cost of road = Cost of making road per m² X Area of the road
= 70 X 640 = ₹44800
Answer = ₹44800