Smith rides his scooter 14 km at an average speed of 16 km/hr and again travels 16 km at an average speed of 14 km/hr. What is her average speed for the entire trip approximately?

(A) 11.14 Km/h
(B) 12.87 Km/h
(C) 14.86 Km/h
(D) 16.54 Km/h

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