A certain species of bird migrates 14,000 miles in 90 days. It rests 8 hours each day and flies the rest. (1 km. is about 0.62 miles)
A person "race walking" can walk 20 kilometers in 100 minutes.
Who moves faster, the bird or the person? Justify your reasoning

In this exercise we have to identify who has the highest speed, for this it will be necessary to use the definition of distance, in this way we have:

The bird moves faster

Then from the velocity we find that:

So, the speed is generally, can be caculated as:

See more about speed at link

The bird moves faster

Step-by-step explanation:

Here, we want to get which of the two moves faster

This is a matter of speed

14,000 to km would be;

14,000/0.62 = 22,581 km

There is a rest of 8 hours per day

So 16 hours is used in moving

for 90 days, the total

time spent moving is 16(90) = 1,440 hours

So, the speed is generally

distance/time = 22.581/1,440 = 15.68215 km/h

For the person

100 minutes is same as 60 + 40 minutes

= 1 hour + 40/60

40/60 = 2/3 = 0.667

So the total

time is 1.667 hours

The speed is thus;

20/1.667 = 12 km/h

Comparing the two speeds, we can see that the bird moves faster

answer: the answer is 110