Question

Question #974b9

Answer 1

400 minutes is longer by 69 minutes

Explanation:

Let's convert 5 hours and 31 minutes into minutes.

1 hour = 60 minutes

`therefore` 5 hours = 60 x 5 = 300 minutes.

Now we just add the 31 minutes to get 331 minutes.

`therefore` 400 minutes is longer by 69 minutes.

Answer 2

See a solution process below:

Explanation:

First, we can convert "5 hours 31 minutes" to minutes.

There are 60 minutes per hour. Therefore:

`1" hour" = 60" minutes")`

`color(red)(5) xx 1" hour" = color(red)(5) xx 60" minutes"`

`5" hours" = 300" minutes"`

`300" minutes" + 31" minutes" = 331" minutes"`

The answer to the first part of the question is:

400 minutes is longer than 5 hours 31 minutes.

Now, we can subtract 331 minutes from 400 minutes to find out how much longer:

#400" minutes" - 331" minutes" = 69" minutes"

`69" minutes" = 60" minutes" + 9 "minutes" =`

`1" hour " 9" minutes"`

It is 69 minutes or 1 hour 9 minutes longer.

Answer 3

400 minutes is longer
69 minutes longer which is the same a 1 hour 9 minutes

Explanation:

Using the known condition that 1 hour is the same length of time as 60 minutes

So for 5 hours we have 5 lots of 60 minutes

`color(white)(3)60`
`color(white)(3)60`
`color(white)(3)60`
`color(white)(3)60`
`ul(color(white)(3)60 larr" Add")`
`300`

Note that `60` is the same as `6xx10`

So `5xx60` is the same as `5xx6xx10 = 30xx10=300`

Thus 5 hours and 31 minutes is:

`300`
`ul(color(white)(3)31larr" Add")`
`331` minutes

But `331` minutes is less than `400` minutes

So 400 minutes is longer

The difference in time is

`400`
`ul(331 larr" Subtract")`
`color(white)(3)69` minutes `->" 1 hour 9 minutes"`