A man covers equal distances at the rateof 2 kms/hr., 3 kms./hr. and 4 – InterviewSolution

InterviewSolution

1.	A man covers equal distances at the rateof 2 kms/hr., 3 kms./hr. and 4 kms./hr. Find hisaverage speed (in kms./hr.) for the wholejourney
Answer» Let the distance be x kms. For speed = 2 km/hr, time taken = distance/speed. => time = x/2. For speed = 3 km/hr, time taken = distance/speed. => time = x/3. For speed = 4 km/hr, time taken = distance/speed. => time = x/4. Total speed = Total distance/ Total time= (x+x+x)/(x/2 + x/3 + x/4)= 3x/(13x/12)= 36/13 kms/hr

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