Trying to be on time for class, a girl moves at 2.4 m/s down a 52 m-long hallway, 1.2 m/s down a much more crowded hallway that is 79 m long, and the last 25 m to her class at 3.4 m/s. How long does it take her to reach her class?
94
304.6 seconds
A girl rides her bike at 15 m/s for 20 s. How far does she travel in that time?
What calculations did you perform to get this answer?
t= vd
t= (2.4 m/s)(52 m)
t= ?
t= (1.2 m/s)(79 m)
t= ?
t= (3.4 m/s)(25 m)
t= ?
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Trying to be on time for class, a girl moves at 2.4 m/s down a 52 m-long hallway, 1.2 m/s down a much more crowded hallway that is 79 m long, and the last 25 m to her class at 3.4 m/s. How long does it take her to reach her class
To find out how long it takes for the girl to reach her class, we need to calculate the time it takes for her to travel through each section of the hallway and then add them together.
Let's start by finding the time it takes for her to travel the first section of the hallway. The distance is 52 m, and her speed is 2.4 m/s. We can use the formula: time = distance / speed. Plugging in the values, we have time = 52 m / 2.4 m/s = 21.67 s.
Next, let's find the time for the second section of the hallway. The distance is 79 m, and her speed is 1.2 m/s. Using the same formula, we have time = 79 m / 1.2 m/s = 65.83 s.
Finally, let's calculate the time it takes for her to travel the last section of the hallway. The distance is 25 m, and her speed is 3.4 m/s. Again using the formula, we have time = 25 m / 3.4 m/s = 7.35 s.
Now, we add up the times for each section: 21.67 s + 65.83 s + 7.35 s = 94.85 s.
Therefore, it takes her approximately 94.85 seconds to reach her class.