Robot A can unpack 45 boxes per hour, and Robot B can unpack 40 boxes per hour. How long will it take both robots working together to unpack

Question

Robot A can unpack 45 boxes per hour, and Robot B can unpack 40 boxes per hour. How long will it take both robots working together to unpack 1,275 boxes?

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Ruby 2 months 2021-11-30T21:44:45+00:00 1 Answer 0 views 0

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    2021-11-30T21:46:17+00:00

    15 hours
    45+40=85
    85×15=1275
    So the answer would be 15 hours
    Hope this helps 🙂

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45:7+7-4:2-5:5*4+35:2 =? ( )