Rohan has a total of 20 x 2 = <<20*2=40>>40 coconut trees.

And he has a total of 40 x 6 = <<40*6=240>>240 coconuts.

So, the total coconut he will have after 6 months is 240 x 2= <<240*2=480>>480.

Therefore, the total amount he will earn is 480 x $0.50 = $<<480*0.5=240>>240.

# Answer

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Question:
Rohan owns a 20-square meter coconut farm. Each square meter has 2 coconut trees and each tree has 6 coconuts. If the coconuts can be harvested every 3 months and each coconut costs $0.50, how much will he earn after 6 months?
Answer:
Let's think step by step.

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Rohan owns a 20-square meter coconut farm. Each square meter has 2 coconut trees and each tree has 6 coconuts. If the coconuts can be harvested every 3 months and each coconut costs $0.50, how much will he earn after 6 months?
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