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A train covers distances 10 km, 20 km and 20 km at 90 km/hr.
The average speed of the train in km/hr is approximately

(a) 52

(b) 60

(c) 69

(d) 66

Question Posted / chief


A train covers distances 10 km, 20 km and 20 km at 90 km/hr. The average speed of the train in km/h..

Answer / chief

( d ) 66

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