A car travels a distance of 75 km at the speed of 25 km/h. It covers the next 25 km of its journey at the speed of 5 km/h and the last 50 km of its journey at the speed of 25 km/h.What is the average speed of car?
15 km/h
12.5 km /h
40 km/h
25 km/h
A
15 km/h
B
12.5 km /h
C
40 km/h
D
25 km/h
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