Question

There are 20 guests at a party. The host has 8 gallons of punch. He estimates that each guest will drink 2 cups of punch. If his estimate is correct, how much punch will be left over at the end of the party?

Answer 1

`20.8143L = 88` cups

Explanation:

20 guests times 2 cups of punch each = 40 cups of punch drunk total.

Then take that off the 8 gallon original amount of punch
(according to google 8 gallons is 30.2833L)

Assuming that 1 cup = 236.6 mL,

`40*236.6=9464` mL = 9.464 L,

then the estimate is
`30.2833-9.464 =`20.8143L total.

Answer 2

`88` cups or `5.5` gallons

Explanation:

`1` quart is equivalent to `0.25` gallons.

`4` cups are equivalent to `1` quart.

So, `4` cups are equivalent to `0.25` gallons.

Therefore, `1` cup is equivalent to `0.25 div 4 = 0.0625` gallons.

Now, the host has `8` gallons of punch for his party.

That is equivalent to `8 div 0.0625 = 128` cups.

Also, there are `20` guests at the party, and each guest will drink `2` cups of punch.

In total, the guests will drink `20 times 2 = 40` cups of punch.

If his estimate is correct, there will be `128 - 40 = 88` cups of punch left at the party.

This is also equivalent to `88 times 0.0625 = 5.5` gallons.