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Thread: Fundamental Unitary System

  1. #1
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    Fundamental Unitary System

    Can anyone please help me on below math problem?

    Question: A mowed 3/4 of his lawn in 5/4 hours. B, who works twice as fast, then started the remaining work and finished it. How many minutes did B work?
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  2. #2
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    Re: Fundamental Unitary System

    Quote Originally Posted by Mushfique View Post
    Can anyone please help me on below math problem?

    Question: A mowed 3/4 of his lawn in 5/4 hours. B, who works twice as fast, then started the remaining work and finished it. How many minutes did B work?
    So A worked at a rate of (3/4)/(5/4)= 3/5 "lawn per hour". B works twice as fast that, 6/5 lawn per hour. How long does it take to mow 1/4 lawn at 6/5 lawn per hour?
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  3. #3
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    Re: Fundamental Unitary System

    Question: A mowed 3/4 of his lawn in 5/4 hours. B, who works twice as fast, then started the remaining work and finished it. How many minutes did B work?
    A ... 3/4 of the lawn in 5/4 hours = 3/4 of the lawn in 75 minutes = 1/4 of the lawn in 25 minutes

    1/4 of the lawn is left for B who works twice as fast ... B takes 12.5 minutes to finish

    next time post problems like this in the pre-university algebra forum ... the "math talk" discussion forum is for general discussion of mathematics (no problems)
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    Re: Fundamental Unitary System

    Thanks!
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