A man is running and walking a distance of 2 km. He will walk for 1 km and run for 1 km. At the end, his average velocity was recorded to be 15 km/hr. His running velocity is twice that of his walking velocity. What was his walking speed? The answer was recorded to be 7.5 km/hr, but cannot figure it out unfortunately. This is how I attempted to do the problem: Equation relating the two velocities: time = 1/2(Distance/Velocity of walking) + 1/2(Distance/Velocity of running) Average Velocity=Total Distance/Total Time 15 km/hr= 2 km / x hours x= (2/15) hr or (.1333333333 hr) Tried doing things past this point but cannot get the correct answer.