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A boat is rowed across a river at the rate of 4.5km/hr. The river flows at the rate of 6km/hr. The velocity of boat in m/s is

A boat is rowed across a river at the rate of 4.5km/hr. The river flows at the rate of 6km/hr. The velocity of boat in m/s is

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
the boat and river move at a right angle 
so 
4.5^2 + 6^2 = V^2 = 56.25 
V = 7.5 km/hr 
then 
7.5 km/hr * 1000 m/km * 1 hr/3600 s = 2.1 m/s

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