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

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

12*5=<<12*5=60>>60 minutes passed.

# Answer

60
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
There were 10 snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. How many minutes passed before there were 58 snowflakes?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
60
There were 10 snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. How many minutes passed before there were 58 snowflakes?
train