If the total distance covered to cape town was 1420 km, calculate the average speed (in km /h) at which they drove , correct to two decimal places.
Use formula: average speed = distance × time
*they left 6am and reached their destination at 23:20
To calculate the average speed, we need to divide the total distance covered by the total time taken.
First, let's calculate the time taken. They left at 6 am and reached their destination at 23:20, so the total time taken is 23 hours and 20 minutes.
To convert the minutes to hours, divide 20 minutes by 60:
20 minutes / 60 = 0.33 hours
Now, add the hours and the converted minutes:
23 hours + 0.33 hours = 23.33 hours
Now, we can calculate the average speed:
average speed = total distance / total time
average speed = 1420 km / 23.33 hours
Calculating this division gives us:
average speed = 60.93 km/h (rounded to two decimal places)
Therefore, the average speed at which they drove is 60.93 km/h.
To calculate the average speed, we need to divide the total distance covered by the time taken.
First, let's calculate the time taken:
The time they left is 6:00 am, and they reached their destination at 23:20.
To find the time taken, we subtract the departure time from the arrival time:
23:20 - 6:00 = 17:20.
However, this needs to be converted to hours and minutes. Since 1 hour is equal to 60 minutes, we divide 20 minutes by 60 and add it to the 17 hours:
17 hours + (20 minutes / 60) hours = 17 hours + 0.33 hours = 17.33 hours.
Now we can calculate the average speed:
Average speed = Total distance / Time taken.
Given that the total distance covered is 1420 km and the time taken is 17.33 hours, we can plug these values into the formula:
Average speed = 1420 km / 17.33 hours ≈ 82.00 km/h (rounded to two decimal places).
Therefore, the average speed at which they drove was approximately 82.00 km/h.