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
Ex 9.2, 14
Ex 9.2, 15
Ex 9.2, 16 Important You are here
Ex 9.2, 17 Important
Last updated at April 16, 2024 by Teachoo
Ex 9.2, 16 How many times a wheel of radius 28 cm must rotate to go 352 m? (ππππ π=22/7) In 1 rotation, wheel travels distance = Circumference Therefore, Number of rotations = (π«πππππππ πππππππππ )/(πͺππππππππππππ ππ πππππ) Circumference of wheel Radius of wheel = r = 28 cm Circumference of wheel = 2πr = 2 Γ ππ/π Γ 28 = 2 Γ 22 Γ 4 = 44 Γ 4 = 176 cm = 176 Γ 1/100 m = 1.76 m Now Given, Distance travelled = 352 m Number of rotations = (π·ππ π‘ππππ π‘πππ£ππππ)/(πΆππππ’πππππππ ππ π€βπππ) β΄ Number of rotations = πππ/(π.ππ) = 352/176 Γ 100 = πππ/ππ Γ 100 = 88/44 Γ 100 = 2 Γ 100 = 200 β΄ Wheel rotates 200 times