# A golf ball weighs about 45.9 grams. About how many ounces would a dozen golf balls weigh?

##### 2 Answers

I've set up a conversion equation:

You can just say it out loud what you're trying to do and that will help you write out your ratios.

45.9 grams **per** 1 ball

1 ounce **per** 28.35 grams

We have 12 balls

so the weight of 12 balls is 19.43 ounces rounded to 2 decimal places

#### Explanation:

Using Matt B's conversion

1 ounce per 28.35 grams

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Given:

Expressing this as a ratio for 12 balls:

So for 12 balls we have

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If 1 ounce is the same weight as 28.35 grams then again by using ratio:

I have not completed the division on the top yet as this will introduce rounding errors.

So

So

so the weight of 12 balls is 19.43 ounces rounded to 2 decimal places