Question
A man travels some distance at a speed of 20 km/hr and
returns at a speed of 12 km/hr. If the total time taken by him is 2 hrs 40 min, the distance isÂSolution
Let the distance travelled by a man be D km According to the question, Total time taken = 2 hrs 40 min = 2(40/60) = 8/3 hours Total time = T1 + T2 D/20 + D/12 = 8/3 (3D + 5D)/60 = 8/3 8D/60 = 8/3 D = 20 kmÂ
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