a) 8.5 km/hr
b) 9 km/hr
c) 10 km/hr
d) 12.5 km/hr
Answer: c
Explanation: Man’s rate in still water
= (15 – 2.5) km/hr
= 12.5 km/hr.
Man’s rate against the current
= (12.5 – 2.5) km/hr
= 10 km/hr.
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