How much distance in kilometer, a cyclist will cover from 11:10 am to 11:50 am while cycling at the speed of 15 kilometer per hour?

A) 10

B) 11

C) 12

D) 13

Time = 11 : 50 AM – 11 : 10 AM

          = 40 min

          = (40/60) hr 

          = (2/3) hr 

Speed = 15 km/h

Distance = Speed x Time 

                = 15 x (2/3) 

                = 10 km