Question

A migrating bird flies 42 miles in 3 hours. How many miles does it fly in 5 hours?

Answer 1

70 miles.

Explanation:

In this question we are given the speed of the migrating bird. If we remember the definition of speed we will remember that speed is distance the object/body traveled, divided by the time it took the object/body to travel this distance.

Solution:

Firstly we need to find out what distance will the bird travel in 1 hour. We can easily do that science we know the distance it travels in 3 hours. So we just use the property of a fraction that states that if we multiply or divide the denominator and the numerator by the same number we will get a fraction of the same value but written a bit differently. So we divide the numerator and the denominator by 3 and get

`(42 miles)/(3 hours)` =
`(14 miles)/(1hour)`

Now we know what distance the bird travels in one hour so we can easily figure how much the bird will travel in 5 hours by multiplying the numerator and the denominator by 5. So we do...

`(14 miles)/(1 hour)` =
`(70 miles)/(5 hours)`

And we get that the bird will travel 70 miles in 5 hours.

Answer 2

42/3 = 14 miles per hour
14 * 5 = 70
Solution: 70 miles