Carl and rick are traveling to a store 5 miles away. Carl is riding a bike, so he’s going 12 mph faster than rick. If it takes rick 45 minut

Question

Carl and rick are traveling to a store 5 miles away. Carl is riding a bike, so he’s going 12 mph faster than rick. If it takes rick 45 minutes, how long it take carl?

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Anna 1 month 2021-10-22T09:55:25+00:00 1 Answer 0 views 0

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    2021-10-22T09:56:35+00:00

    Answer:

    Therefore Carl takes=16.07 mins  

    Step-by-step explanation:

    Speed : speed is the ratio of distance to time.

    speed=\frac{distance}{time}

    The S.I unit of speed = m/s

    The C.G.S unit of speed = cm/s

    12 mph means 12 miles per hour.

    Let the speed of Carl be x.

    Carl is going 12mph faster than Rick.

    Then the speed of Rick is = (x-12)mph

    We know that,

    time =\frac{distance}{speed}

    Time =\frac{5}{x-12} h

    45 minutes = \frac{45}{60} h

    According to the problem,

    \frac{5}{x-12} =\frac{45}{60}

    \Rightarrow 45(x-12)=5\times60

    \Rightarrow45x-540 = 300

    \Rightarrow 45x=300+540

    \Rightarrow x=\frac{840}{45}

    We know that,

    time =\frac{distance}{speed}

    Therefore Carl takes  =\frac{5}{\frac{840}{45} } h   =\frac{5\times 45\times 60}{840} mins =16.07 mins  

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