West Bengal Board Class 9 Math Solution Chapter 18 - Area of Circular RegionShare
West Bengal Board Class 9 Math Solution Chapter 18 - Area of Circular Region
Sumit and Reba have taken two cupper wire having same length. Sumit bent the wire in the form of a rectangular shape of which length and breadth are 48 cm. and 40 cm. But Reba bent the copper wire with same length in the form of a circle. Let us see by calculating which will cover maximum place between the rectangle drawn by Sumit and circle drawn by Reba.
At the centre of rectangular field of Pioneer atheletic club there is a circular Pool of which length of radius is 14 meter. The length and breadth of rectangular field are 60 meter and 42 meter respectively. Let us see by calculating how much cost it will take for planting grass of remaining place of rectangular field except pool at the rate of Rs. 75 per square meter.
A 7 meter wide path runs outside a circular park of Etalgacha Friends association club along perimeter. Let us write by calculating the area of path, if the perimeter of circular park is 352 meter, let us write by calculating how much cost for concreting the path at the rate of Rs. 20 per square meter.