Answer:
- 3 hours
- 1 hour 45 minutes
- 300 miles
Step-by-step explanation:
1. The trains are moving toward each other at a total speed of 50 +20 = 70 miles per hour. Together, they cover the 210 mile distance in ...
time = distance/speed
time = 210 mi/(70 mi/h) = 3 h
The trains collide after 3 hours.
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2. The fly is closing with the freight train at a speed of 100 +20 = 120 miles per hour. Together, the fly and the train cover the initial 210 mile distance in ...
(210 mi)/(120 mi/h) = 7/4 h = 1 hour 45 minutes
The fly first meets the oncoming freight train after 1 h 45 min.
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3. The fly is flying for all three hours before the trains collide, so, at 100 miles per hour, will fly 300 miles.
Answer:
48.8m
Step-by-step explanation:
Formula for square area =
= 148.84 ![m^{2}](https://tex.z-dn.net/?f=m%5E%7B2%7D)
=> a =
= 12.2
Formula for square perimeter = 4a = 4 x 12.2 = 48.8 m
A4 means the 4th number
so it is 17
1. X=5
2. I think I’m not sure is - 5.04