Mounika was jogging on a circular path of radius 7m. If it took her 10 seconds to complete half of the revolution. Find the ratio of average velocity to average speed of Mounika. (Take value of pi as 22/7) (A) 5/11 (B) 7/11 (C) 9/11 (D) 10/11
Answers
Given : Mounika was jogging on a circular path of radius 7m.
it took her 10 seconds to complete half of the revolution.
To Find : the ratio of average velocity to average speed of Mounika.
(Take value of pi as 22/7)
(A) 5/11 (B) 7/11 (C) 9/11 (D) 10/11
Solution:
Average velocity = Displacement / time
Displacement = Diameter = 2 * radius = 2 * 7 = 14 m
Average Speed = Distance / time
Distance = π* radius = (22/7) 7 = 22 m
ratio of average velocity to average speed = 14/22
= 7/11
7/11 is the required ratio
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