The average speed of a person while he is driving to his office is 15 km per hour but while returning from the office along the same path his average speed is 10 km per hour what will be the average speed of the person for the entire journey
Answers
Answered by
0
Answer: 10/3.
Explanation: Average speed = 20km/hr
Formula:
Speed = Distance/time
Average speed = Total distance/Total time taken = 2S1S2/(S1+S2)
Where, S1 and S2 are speed
Calculation:
Let the speed of the man returning from office be 5x units
⇒ Speed when going to office = 1/5 * 5x = x units
According to the question,
(2*x*5x) / (x+5x) = 20
10x = 20*6
x = 12
∴ Speed when going to office = 12 km/hr = 12*5/18 = 10/3
Similar questions