The minute hand of a clock is 10cm long. Find the area of the face of the clock described by the minute hand between 8AM and 8.25AM.


Given,


Length of minute hand = 10cm


Angle subtend by minute hand in 25 minute (8-8.25) = 25×6 = 150°


So,


Area described by minute hand between (8-8.25) =



16