jumbo can repair a machine in 1 hour 30 minutes. he asks Rambo to give him support in the process of repair together, they star doing the repair and complete the task in 1 hour only. had Rambo been given this task, how much time would he have taken to repair the machine? Answer is 45 min plz help me plzz genius
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In 1 min he repairs (100/X)% of the machine. Together they need 60 min to repair the same machine. Thus, in 1 min together they complete (100/60)% of the machine. Thus, Rambo needs 180 minutes to repair the machine completely.
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