A man drives a car at a distance of 200km at n average speed of 50km/hr. What must be his average speed for the next 220km. If he is to cover the total distance in 9hours

Answer 1

Time taken for first part of trip = 200 km / (50 km/h) = 4 hours
time remaining for 2nd part of trip = 5 hours
avg speed to go 220 km in that time = 220 km/ 5 hrs = 44 km/h