Question

It takes 12 hours less to travel from point 'C' to point 'D' at a speed of 50 km/h than it takes to travel the same distance at 20 km/h. If 50% of the distance between 'C' and 'D' had been covered at a speed of 40 km/h and the remaining distance had been covered at a speed of 24 km/h, then what would be the total time taken to complete the journey?

A 15h
B 13.33h
C 14.8h
D 11.6h
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