Use reasoning to answer the following question.
There were 10 snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. How many minutes passed before there were 58 snowflakes?

60
Without the first 10 snowflakes, there are 58 - 10 = 48 snowflakes needed.

48 / 4 = 12 5 - minute intervals are needed to get the additional snowflakes.

12 * 5 = 60 minutes passed.

.

The answer is 60