X travelling at 60 km/h reaches his destination on time. He covered two-fifth of the total distance in one-fourth of the total time. What speed (in km/h) should he maintain in the remaining distance to reach destination on time? A. 50 B. (2/8) of (3/4) of 256 C. 48 D. (1/3) of (6/7) of 175
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