Question

Ratio of angular speed of second hand to hour hand of a standard clock is
(1) 12
(2) 60
(3) 720
(4) 180​

Answer 1

Answer:

720

Explanation:

Ratio of angular speed of second hand to hour hand of a standard clock is 720

Second hand covers 360 deg in 60 secs  ( 1 Min)

angular speed of second hand  = 360/60  = 6 deg/s

Hour clock completes 360 deg in 12 hrs  = 12 * 3600 sec

The angular Speed of the hour hand of a clock  = 360/12 * 3600  = 1/120 deg /s

Ratio of angular speed of second hand to hour hand = 6/(1/120)

= 720

Ratio of angular speed of second hand to hour hand = 720