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Kuria takes 2h 15 minutes to cycle from home to the market at an average speed of 8km/h. He cycles from the market back home at an average speed of 12km/h. How much time does Kuria take to cycle from home to the market and back?
A. 3#frac{3}{4}# hours
B. 3#frac{3}{5}# hours
C. 1#frac{1}{2}# hours
D. 5#frac{5}{8}# hours