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Math Help - distance problem

  1. #1
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    distance problem

    Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first lap. The second lap took 25% longer than the first lap. The third lap took 20%
    longer than the second lap. The final lap took 50% longer than the third. What was
    Mary’s total walking time for the 4 laps?
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  2. #2
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    Quote Originally Posted by sri340 View Post
    Mary walked 4 laps around the park track. It took Mary 4 minutes to walk the first lap. The second lap took 25% longer than the first lap. The third lap took 20%
    longer than the second lap. The final lap took 50% longer than the third. What was
    Mary’s total walking time for the 4 laps?

    Lap 1 took 4 mins.
    Lap 2 took 4+0.25(4)=4+1=5 mins
    Lap 3 took 5+0.2(5)=5+1=6 mins
    Lap 4 took 6+0.5(6)=6+3=8 mins

    Total time = 4+5+6+8 mins

    A percentage is expressed in English using only the numerator of the fraction.

    25%= \frac{25}{100}=0.25

    20%= \frac{20}{100}=0.2 etc
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