###Human: A man intends to complete a journey of 24 km in 8 hours. If he travels at a speed of 4km/hr for the first four hours, at what speed does he need to travel for the remainder of the journey to be right on time?, ### Assistant: He covers 4km/hr*4hrs = 16km in the first 4 hours
He has 24-16 = 8km left to cover
He has 8-4 = 4 hours to cover the remaining 8km
He has to travel at a speed of 8km/4hrs = 2km/hr to be right on time 
 So the answer is :  2