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Mariah walks 6 miles per hour. Bobby walks 4,400 yards in a half-hour. Given that 1 mile = 1,760 yards, how much faster does Mariah walk than Bobby, in miles per hour?

Sagot :

Answer: 1 mph

Step-by-step explanation:

Given

Speed of Mariah is  [tex]v_m=6\ mph[/tex]

Bobby walks 4400 yards in 0.5 hr

speed of bobby is  

[tex]v_b=\dfrac{4400}{0.5\times 1760}=5\ mph\quad [\text{converting yards into miles by dividing by 1760}][/tex]

The difference in the speed of Mariah and bobby is

[tex]\Rightarrow v_m-v_b=6-5=1\ mph[/tex]

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