Question

If a minute hand advance at the rate of 9 degree per minute,how many minutes does the clock hand gain inhalf hour

Answer 1

Answer:

15 Mins

Step-by-step explanation:

If a minute hand advance at the rate of 9 degree per minute,how many minutes does the clock hand gain in half hour

Minute Hand Advance at the rate of 9 deg per minute

in Half an hour Minute Hand Advance = 30*9 = 270 deg

360 Deg = 60 mins

=> 1 deg = 1/6 Mins

=> 270 deg = 270/6 = 45 mins

minute clock has gained =  45 - 30 = 15 Mins

Answer 2

Answer:

Step-by-step explanation:

In 1 min it gains 9 degree,

in 30 min it will gain 270 degree.

an ideal clock travels 6 degree in 1 min , so it will travel 30 * 6= 180 degree in 30 mins.

Therefore total gain is 270-180= 90 degree

So, if 6 degree travels in 1 min  then 90 degree travels in 90 divided by 6 = 15 mins.