Question

Arlene sleeps for seven hours and 20 minutes each night how many hours of sleep does she get in a week right your answer as a mixed number

Answer 1

51 and 1/3 hours

Explanation:

7 *7 49

1/3*7=7/3=2 1/3 + 49= 51 1/3

Answer 2

Arlene is getting
`51(1)/(3)` hours of sleep in a week.

SOLUTION:

Given, Arlene sleeps for seven hours and 20 minutes each night

We need find how many hours of sleep does she get in a week as a mixed number?

Now, total sleeping time for each night is 7 hours and 20 minutes

Let us convert hours in to minutes first and then in last we can convert it again to hours.

Sleeping time per one night = 7 hours + 20 minutes

= 7 x 60 minutes + 20 minutes

= 420 + 20 minutes

= 440 minutes

Now, sleeping time per one week = sleeping time per one night x 7 nights

= 440 x 7

= 3080 minutes

Now, sleeping time per week in hours =
`\frac{3080 \text { minutes }}{60 \text { minutes }}`

`=(3060+20)/(60)` [20 is remainder]

`\begin{array}{l}{=51+(20)/(60)} \\\\ {=51+(1)/(3)} \\\\ {=51 (1)/(3)}\end{array}`

Hence Arlene is getting
`51(1)/(3)` hours of sleep in a week.