Ex 9.2
Ex 9.2, 1 (b) Important
Ex 9.2, 1 (c)
Ex 9.2, 2 (a) Important
Ex 9.2, 2 (b) Important
Ex 9.2, 2 (c)
Ex 9.2, 3
Ex 9.2, 4 Important
Ex 9.2, 5 Important
Ex 9.2, 6
Ex 9.2, 7 Important
Ex 9.2, 8
Ex 9.2, 9 Important
Ex 9.2, 10 Important
Ex 9.2, 11
Ex 9.2, 12 Important
Ex 9.2, 13 Important You are here
Ex 9.2, 14
Ex 9.2, 15
Ex 9.2, 16 Important
Ex 9.2, 17 Important
Last updated at April 16, 2024 by Teachoo
Ex 9.2, 13 A circular flower bed is surrounded by a path 4 m wide. The diameter of the flower bed is 66 m. What is the area of this path? (π = 3.14) Area of path = Area of larger circle − Area of smaller circular flower bed Let’s find radius of larger and smaller circle Smaller circle Diameter of flower bed = d = 66 m Radius of flower bed = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = 66/2 = 33 m Larger circle Radius of larger circle = Radius of flower bed + Width of path = 33 + 4 = 37 m Area of Larger circle Area of Larger circle = 𝜋r2 = 𝜋 (37)2 = 1369𝜋 cm2 Area of smaller circle Area of smaller circle = 𝜋r2 = 𝜋 (33)2 = 1089𝜋 cm2 Now, Area of path = Area of larger path − Area of smaller flower bed = 1369𝜋 − 1089𝜋 = (1369 − 1089) 𝜋 = (280) × 3.14 = 280 × 314/100 = 28 × 314/10 = 8792/10 = 879.2 m2 Therefore, Area of path is 879.2 m2