Question

The length of a minute hand of a clock is 7 cm. Find out the average speed and average velocity (in cm/min) of the tip of the minute hand when it moves during a time interval from 3: 15 pm to 3: 45 pm? fast pls fast​

Answer 1

Explanation:

Correct option is

C

69.7×10−5

The distance moved by tip of minutes hand when it moves during a time interval from 3 p.m. to 3.45 p.m. is rθ

where, r = length of minute hand

θ = angle moved by minutes hand

⇒ Distance covered =4×23π=6πcm

⇒distance=6πcm=0.06πm

 ⇒velocity=timedistance 

⇒velocity=45×600.06π=69.7×10−5ms−1