The park is 2,000,000 square feet because 1000*2000 =<<1000*2000=2000000>>2,000,000.

Thus, there are 100,000 trees in the park because 2,000,000/20 = <<2000000/20=100000>>100,000.

# Answer

100,000
Question:
A park is 1000 feet long and 2000 feet wide. If there is 1 tree per 20 square feet, how many trees are there in the park?
Answer:
Let's think step by step.

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100,000
A park is 1000 feet long and 2000 feet wide. If there is 1 tree per 20 square feet, how many trees are there in the park?
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