Monday, March 2, 2015

The distance between A and B is 900 km. How long does it take to go from A to B if a person walks: A) 5 km/h without stopping? B) 5 km/h for 10h...

Since you've not provided anything about the direction of
moving, but the average speed, we can determine the time of
travel:


We'll recall the formula that gives the time when
we know the distance and the average speed:


total time =
total distance walked/v av.


total time =
900Km/5Km/h


total time = 180
hours


If the person walks 5Km/h, 10h/day,
we'll
get:


5km................1h


x
km...............10h


We'll apply the rule of 3, to get the
number of km traveled in 10 hours.


x = 5*10 =
50Km


The person walks from A to B within
900/50 = 18 days.


To determine the time of
travel if the average speed is of 1.5m/s, we'll convert the 900Km into meters =>
900Km = 900*1000= 9*10^5 m


total time = 9*10^5 m/1.5
m/s


total time =
9*10^6/15


total time =
3*10^6/5


total time = 6*10^5
s

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