If a man cycles at 10 km/hr, then he arrives at a certain place at 1 pm. If he cycles at 15 km/hr, he will arrive at the same place at 11 am. At what speed must he cycles to get there at noon?
A
11 km/hr
B
12 km / hr
C
13 km / hr
D
14 km / hr
Correct Answer: 12 km / hr