65 km per hour, so in three hours it travels 65 x 3 km = 195km
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2,700
3 hours 15 minutes.
720 km / 9 hr = 80 km / hr.
(44 km) / (2 hr) = 22 km per hour
The speed of the boat is 36 km/h. Going upstream: 3h x 36km/h = 108 km, minus (6x3 =18 km) = 90 km Going downstream: 2h x 36km/h = 72 km, plus (6x2 =12 km) = 90 km