Total distance = 75 km time = 3 hours average speed = 75km/3hrs = 25 km/hr
32 km/h
The average speed for the first part of the journey is 30 km/h (60 km / 2 hours) and for the second part is 34 km/h (68 km / 2 hours). The overall average speed for the whole journey is the total distance (128 km) divided by the total time (4 hours), which is 32 km/h.
Average speed is not measuring the distance traveled in total, as that is total distance. For example, if a car travels 30 miles in 1 hour and 90 miles in the next 2 hours, the average speed is not calculated as (30 + 90) / 3 hours.
The most important formula to memorize is: Distance = Rate (speed) x Time (hours or minutes, etc..) Therefore, the average rate on the first date can be calculated as follows: Rate = Distance / Speed 348 miles divided by 6 hours = 58 miles per hour. At that rate, a total of 58 miles times 9 hour = 522 miles can be driven by the family in the next 9 hours.
First 30k takes 45 min, second 30k takes 90 min, total 60k in 2¼ hours so average speed = 60 x 4/9 = 26 and 2/3 kph
Average speed = (total distance covered) divided by (time to cover the distance)Distance in the first 2.5 hours = (2.5 x 60) = 150 milesDistance in the next 1.5 hours = (1.5 x 75) = 112.5 milesTotal distance = (150 + 112.5) = 262.5 milesTotal time = (2.5 + 1.5) = 4 hoursAverage speed = (262.5/4) = 65.625 miles per hour
The average speed over the first 30 miles is equal to the average speed over the next 15 miles. You cannot guarantee that the speed was constant inbetween, though. The average speeds are 45 MPH for each leg.
In all he will cover 40 km. To do so at an average speed of 10 kph means his total journey will take 4 hours. He has taken 3hr 20 min for the first part (30km @ 9kph), so he has 40 min to cover the final 10km. Required speed is therefore 10 x 60/40 ie 15 kph.
To calculate speed, you first convert the time to hours: 2 minutes 29 seconds is 2.4833 minutes, or approximately 0.0414 hours. Next, divide the distance traveled (288900 km) by the time taken (0.0414 hours) to find the speed. The speed would be approximately 6,970,531 km/h.
89.2
A day on Neptune, from one sunrise to the next, lasts about 16 hours and 6 minutes.