Given :
Xinran walks 3 mi/h uphill, 4 mi/h on flat land and 5 mi/h downhill.
To Find :
If he walks one mile uphill, then one mile on flat land and then returns by the same route to his starting point, how many minutes does he walk.
Solution :
Time taken to walk one mile uphill is :
![t_1 = \dfrac{1}{3}\ hours](https://tex.z-dn.net/?f=t_1%20%3D%20%5Cdfrac%7B1%7D%7B3%7D%5C%20hours)
Time taken to walk two mile on flat land( one on going and one or returning ) is :
![t_2 = \dfrac{2}{4}\ hours\\\\ t_2 = \dfrac{1}{2}\ hours](https://tex.z-dn.net/?f=t_2%20%3D%20%5Cdfrac%7B2%7D%7B4%7D%5C%20hours%5C%5C%5C%5C%20t_2%20%3D%20%5Cdfrac%7B1%7D%7B2%7D%5C%20hours)
Time taken to walk one mile downhill is :
![t_3 = \dfrac{1}{5}\ hours](https://tex.z-dn.net/?f=t_3%20%3D%20%5Cdfrac%7B1%7D%7B5%7D%5C%20hours)
Total time taken :
![T = t_1 + t_2 + t_3 \\\\T = \dfrac{1}{3} + \dfrac{1}{2}+\dfrac{1}{5}\\\\T = \dfrac{10 + 15 + 6}{30} \\\\T = \dfrac{31}{30}\ hours = \dfrac{31}{30}\times 60 \ minutes\\\\T = 62\ minutes](https://tex.z-dn.net/?f=T%20%3D%20t_1%20%2B%20t_2%20%2B%20t_3%20%5C%5C%5C%5CT%20%3D%20%5Cdfrac%7B1%7D%7B3%7D%20%2B%20%5Cdfrac%7B1%7D%7B2%7D%2B%5Cdfrac%7B1%7D%7B5%7D%5C%5C%5C%5CT%20%3D%20%5Cdfrac%7B10%20%2B%2015%20%2B%206%7D%7B30%7D%20%5C%5C%5C%5CT%20%3D%20%5Cdfrac%7B31%7D%7B30%7D%5C%20hours%20%20%3D%20%5Cdfrac%7B31%7D%7B30%7D%5Ctimes%2060%20%20%5C%20minutes%5C%5C%5C%5CT%20%3D%2062%5C%20minutes)
Therefore, time taken un 62 minutes.
Answer:so the answer is 224 dollars
Step-by-step explanation:
30 percent of 320 is about 96 dollars saving
Answer:
the quantity obtained by dividing the number one by a given quantity.
Answer:
n = Variable (because a letter is in place of a number that could be any number, therefore, varying, making it a variable.)
3 = Constant (because the numbers stay the same, they are constant)
Hope this helps :)
I don’t have much advice, but I would make yourself a schedule and a to-do list so you stay in track, and know what you’re doing each day so you can hold yourself accountable and can’t have any excuses about “not knowing about the work” because if you’re organized and get it done fast, you will be able to know about all of you work and have beTter grades since you have more time to learn the material and turn it in on time
Thanks for the points lol