Question

The minute hand of a clock in 7cm long find displacement and distance covered by it from 9:00am to9:30 am

Answer 1

From 9:00am to 9:30am 180 degree will be covered.
Therefore,
Displacement= 2r
                      =2*7
                      =14 cm
180 degree means straight line.
Therefore,
Distance= 2πr/2
              =πr
              =22*7/7
              =22cm