A person crosses a 1200 m long street in 10 minutes. What is his speed in km per hour?

A7.2 kmph ✓ Correct

B8 kmph

C9 kmph

DNone of the above

Correct answer: (A) 7.2 kmph

Explanation

His speed is 7.2 kmph.

Distance = 1200 m = 1.2 km and time = 10 min = 1/6 hour.

Speed = distance / time.

Speed = 1.2 / (1/6) = 1.2 x 6 = 7.2 km/h.

Check: 1200 m in 10 min = 120 m/min = 7.2 km/h.

So his speed is 7.2 kmph.

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