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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.

Sagot :

colevv

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

[tex] = 8 \div \frac{15}{60} [/tex]

[tex] = 8 \div 0.25[/tex]

= 32 km/h

Scott's speed

[tex] = 12 \div \frac{25}{60} [/tex]

[tex] = 12 \div 0.41666...[/tex]

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

∵ 32 km/h > 28.8 km/h

∴ Becky rode faster.

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