Ex 9.2

Ex 9.2, 1 (a)

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

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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