Question
A man covers 250 km, 120 km, and 50 km at the speed of 50 km/h, k km/h and 25 km/h, respectively. If his average speed for the whole journey is 42 km/h, then what is the value of k?
294k+5040 =420k 126k =5040 k =5040/126=40 k =40. More Previous year papers Questions
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