Question
A person crosses a 900-metre long street in 6 minutes.
The speed of the person, in km/h, is:Solution
Length of the street = 900 m = 0.9 km Time = 6 min = (6/60) = 1/10 hours Required speed = Distance/Time = (0.9/1/10) km/h ⇒ (0.9 x 10) km/h ⇒ 9 km/h The speed of the person is 9 km/h.
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