If a van travels for a distance of 18 km at an average speed of 75 km/h and then for a distance of 63 km at an average speed of 90 km/h, what is the total time for the journey in minutes, to the nearest minute?
time = distance/speed
18/75 + 63/90 = 0.24 + 0.70 = 0.94 hr = 56.4 min
or, 56 min
Well, if the van is traveling at an average speed of 75 km/h, we can say it's going 75 km per hour. So, to travel a distance of 18 km, it would take 18/75 hours or 0.24 hours or 14.4 minutes. And similarly, if it's traveling at an average speed of 90 km/h, it would take 63/90 hours or 0.7 hours or 42 minutes.
So, the total time for the journey would be 14.4 minutes + 42 minutes, which is 56.4 minutes. Rounding to the nearest minute, the total time for the journey is approximately 56 minutes.
Hope that helps!
To find the total time for the journey, we need to calculate the time taken for each leg of the journey and then add them together.
First, let's find the time taken for the first leg of the journey.
Distance = 18 km
Speed = 75 km/h
Time = Distance / Speed
Time = 18 km / 75 km/h
Time = 0.24 hours
Converting hours to minutes: 0.24 hours * 60 minutes/hour = 14.4 minutes (to the nearest minute).
Now, let's find the time taken for the second leg of the journey.
Distance = 63 km
Speed = 90 km/h
Time = Distance / Speed
Time = 63 km / 90 km/h
Time = 0.7 hours
Converting hours to minutes: 0.7 hours * 60 minutes/hour = 42 minutes.
Finally, let's find the total time for the journey by adding the times for each leg.
Total time = Time for the first leg + Time for the second leg
Total time = 14.4 minutes + 42 minutes
Total time = 56.4 minutes (to the nearest minute)
Therefore, the total time for the journey is approximately 56 minutes.
To find the total time for the journey, we need to calculate the time taken for each segment of the journey and then add them together.
First, let's calculate the time taken for the van to travel the first distance of 18 km at an average speed of 75 km/h.
Time = Distance / Speed
Time = 18 km / 75 km/h
To convert the time from hours to minutes, we need to multiply it by 60.
Time = (18 / 75) * 60 minutes
Calculating this expression gives us:
Time = 14.4 minutes
Next, let's calculate the time taken for the van to travel the second distance of 63 km at an average speed of 90 km/h.
Time = Distance / Speed
Time = 63 km / 90 km/h
Again, we multiply the time by 60 to convert it to minutes:
Time = (63 / 90) * 60 minutes
Calculating this expression gives us:
Time = 42 minutes
Finally, we add the two times together to get the total time for the journey:
Total time = 14.4 minutes + 42 minutes
Calculating this expression gives us:
Total time = 56.4 minutes
To the nearest minute, the total time for the journey is 56 minutes.