Question

Traveling from point 'I' to point 'J' takes 9 hours less at a speed of 72 km/h compared to traveling at 36 km/h. If 70% of the distance is traveled at 63 km/h and the rest at 28 km/h, calculate the total time taken.

A 13.2h
B 14.1h
C 20 h
D 10.5h
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