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Bruce sells skateboards.It takes him 3 hours to sell 5 skateboards. On Wednesday, he sold 20 skateboards. Thursday he started selling skateboards at 12pm anf finished at 6pm. How many skateboards did he sell on Wednesday and Thursday?

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caymann
he sold 20 skateboards on wednesday and 10 skateboards on thursday so total was 30 skateboards. 

from 12 pm to 6 pm is 6 hours. so he was selling them for a total of 6 hours on thursday. 

in 3 hours he sells 5. 3 hours plus another 3 hours is 6 hours so for the 6 hours he worked he sold 10. ( 3 hours + 3 hours = 5+5 so 10 total. 
He sold 10 skateboards

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