a physical trainer measures her heart rate and counts that it beats 30 times in 15 seconds. what is the unit rate for her heart
1 answer:
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Answer: 2 hours
Step-by-step explanation:
Given : Working alone at their respective constant rates, machine A and machine B can fill a certain order in 3 hours and 6 hours, respectively.
Let t be the time taken by both of them working together.
Then, according to the question, we have
Hence, it will take 2 hours by the two machines .