Question

How many hours are there in exactly 3 weeks?

Answer 1

See a solution process below:

Explanation:

There are 7 days in a week.

There are 24 hours in a day

Therefore, we can write:

`3"weeks" xx (7"days")/(1"week") xx (24"hours")/(1"day") =>`

`3color(red)(cancel(color(black)("weeks"))) xx (7color(blue)(cancel(color(black)("days"))))/(1color(red)(cancel(color(black)("week")))) xx (24"hours")/(1color(blue)(cancel(color(black)("day")))) =>`

`3 xx 7/1 xx (24"hours")/1 =>`

`3 xx 7 xx 24"hours" =>`

`21 xx 24"hours" =>`

`21 xx 24"hours" =>`

`504"hours"`

There are exactly 504 hours in 3 weeks.