Question:
Teresa drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 12 hours. When Teresa drove home, there was no traffic and the trip only took 8 hours. If her average rate was 20 miles per hour faster on the trip home, how far away does Teresa live from the mountains?
Do not do any rounding.
Answer:
480 miles
That is Teresa lives 480 miles from the mountains
Explanation:
Here we have
Distance D = Speed S × Time t
On her way to the mountain we have
D = S × 12
On her way back we have
D = (S +20)×8
Therefore, by comparing the two above equations, we have
S × 12 = (S +20)×8
Therefore, 12·S = 8·S +160 or
4·S = 160
Hence S = 160/4 = 40 miles/hour
Therefore, from D = S × 12, we have
D = 40 × 12 = 480 miles.
To show stuff that we cant see in very well
Answer: The time of motion of the stream of water is calculated as follows;
X = Vₓt
Explanation:
V = volts
<span>I = amps </span>
<span>P = rate or energy transfer (power) </span>
<span>and </span>
<span>P = V * I</span>