We know that
3600 seconds = 1 hour
Then
3400 seconds = 3400/3600
= 17/18 hours
5280 feet = 1 mile
Then
63360 feet = 63360/5280 mile
= 12 mile
So
Distance covered by Nina in 17/18 hours = 12 mile
Then
Distance covered by Nina in 1 hour = 12/(17/18) miles
= 12.71 miles.
From the above deduction, we can conclude that the speed of Nina is 12.71 miles per hour.
Speed of Sophia is 10 miles per hour. So Nina is the girl that rides at a faster speed.
Answer: Your answer is 10/3
Rope(r)
By using Pythagoras:
r^2 = 8^2 + 6^2
r^2 = 64 + 36
r^2 = 100
r = square root of 100
r = 100ft
The answer is C. 100ft
