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
সঠিক উত্তরঃ
B.
12 km / hr
Explanation:
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