Explanation: First make all the units equivalent, so 60 km/h = 60 km/h or 37.28 m/h 45 m/h = 72.42 km/h or 45 m/h 50 km/h = 50 km/h or 31.07 So in one hour the car has gone 60 km or 37.28 m because they travel at 60km/h, which means they get that far in that amount of time. In half an hour they get half of 45 miles, because 45 m/h means they get 45 miles in 60 minutes, so in 30 minutes, or half and hour, they are getting half of 45 = 22.5 miles or 36.21 kilometers. In 45 minutes they are getting 75% of 50 km because 45 minutes is 75% of an hour. So 75% of 50 is 37.5 km or 23.3 miles.
Add this all together and get: Kilometers: 60 + 36.21 + 37.5 = 133.71 km Miles: 37.28 + 22.5 + 23.3 = 83.08 m 133.71 km = 83.08 So it checks out. This is approximately 134 km or 83 miles.
