In an hour, she needs to earn $10 * 100 cents / $1 = <<10*100=1000>>1000 cents.

In an hour, she must pick 1000 cents / 5 cents = <<1000/5=200>>200 weeds.

There are 1hr * (60 minutes / 1 hr) = <<1*60=60>>60 minutes in an hour.

There are 60 minutes * (60 seconds / 1 minute) = <<60*(60/1)=3600>>3600 seconds in an hour.

She has 3600 seconds / 200 = <<3600/200=18>>18 seconds to pick each weed.

# Answer

18
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Heather helps her neighbour pick weeds out of her garden. She gets paid 5 cents for every weed she picks. On average, how many seconds can she take to pick a weed if she wants to earn $10 an hour?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
18
Heather helps her neighbour pick weeds out of her garden. She gets paid 5 cents for every weed she picks. On average, how many seconds can she take to pick a weed if she wants to earn $10 an hour?
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