Mathematics, 06.06.2020 00:01 groovyghoulie5630

PLEASE HELP WILL GIVE BRAINLIEST Ralph can lay down a floor tile in 5 seconds. Bob can lay down a floor tile in 4 seconds. If both boys work together, how many seconds would it take them to install 450 floor tiles?

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PLEASE HELP WILL GIVE BRAINLIEST Ralph can lay down a floor tile in 5 seconds. Bob can lay down a f...