Question

Question #eb630

Answer 1

About 5

Explanation:

There are `240` minutes in `4` hours. The number of bracelets you can make is equal to `240/45`, which is `5.3bar3`. Therefore, in `4` hours, you can complete `5` bracelets.

Answer 2

`4h` will be enough time to make `5` bracelets.

But, you may want to go for `6`.

Explanation:

If you can make a bracelet in `45` minutes (under an hour) and you have four hours, then you know you can make at least `4` bracelets.

Can you make any more in the four hours?
In each of those four hours, you had `60m-45m=15m` or

`4xx1/4h=1h` left over.

So you do have time to make the fifth bracelet. [ANS]

Do you want to make any more in the four hours?
Is it possible to make `6` bracelets in `4h`?

`4h=((60m)/(1hr))4hrto` notice the `6` and `4` in both equations.

From there we can guess that `6` bracelets can be made in `4h` iff we reduce the manufacturing time for each to `40m`.

Then: `4h=((60m)/(1hr))4hr=240m`

And: `6` bracelets `xx40m=240m`.