13. Becky and Scott rode their bicycles to school. Becky rode 8 km in 15 min., while Scott rode 12 km in 25 min. Who rode faster? Just

Question

13. Becky and Scott rode their bicycles to school. Becky rode 8 km in 15 min., while Scott rode 12 km in
25 min. Who rode faster? Justify your answer.

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Doris 3 years 2021-08-13T18:33:38+00:00 1 Answers 12 views 0

Answers ( )

  1. Ladonna
    0
    2021-08-13T18:35:09+00:00
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    Step-by-step explanation:

    Calculate their speed to see who rode faster.

    Speed = Distance ÷ Time

    Change the unit from minutes to hours so that the answers are in km/h.

    Becky’s speed

    = 8 \div \frac{15}{60}

    = 8 \div 0.25

    = 32 km/h

    Scott’s speed

    = 12 \div \frac{25}{60}

    = 12 \div 0.41666...

    = 28.8 km/h (rounded to the nearest tenth)

    ∵ 32 km/h > 28.8 km/h

    ∴ Becky rode faster.

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