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A man travelled 12 km at a speed of 4 km...

A man travelled 12 km at a speed of 4 km/hr and further 10 km at a speed of 5 km/hr. What was his average speed ?

A

4.4 km/hr

B

4.5 km/hr

C

5.0 km/hr

D

2.5 km/hr

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