A man can cover a distance in 1hr 24min by covering 2/3 of the distance at 4 km/h and the rest at 5km/h. The total distance is A. 4km B. 6km C. 6.5km D. 9km Answer Workspace Report Discuss Answer with explanation Answer: Option B Explanation Total time = 1hr 24min = 60min + 24 min = 84 min = `84/60`hours Let total distance be S. `”Time” = “Distance” / “Speed”` `84/64 = ((2S)/3)/4 + (S/3)/5` `84/64 = (S/6) + (S/15)` `84/64 = (21S)/(6*15)` `S = (84 * 6 * 15)/(64 * 21)` S = 6km Workspace
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