Mathematics: Debra can run 20 1/2 miles in 2 1/4 hours. how many miles per hour can she run?

Debra can run 20 1/2 miles in 2 1/4 hours. how many - id20122141672363, firdausmohammed80

Ответ:

izzyisawesome5232

15.03.2022

Mathematics

She can run $\frac{82}{9}* \frac{miles}{hour}$

Step-by-step explanation:

It is required to estimate the velocity of Debra.

Debra can run 20 1/2 miles. It means d = 20 1/2 miles = 41/2 miles.

Debra runs the distance previously presented in 2 1/4 hours.

It means t = 2 1/4 hours = 9/4 hours.

Now, we have the distance (d), and the time requiered (t) in which Debra can run. Finally, to calculate the velocity we need to divide the distance by the time.

$v = \frac{d}{t}\\\\v =\frac{\frac{41}{2}}{\frac{9}{4}} = \frac{41*4}{2*9}=\frac{82}{9}\\v =\frac{82}{9} \frac{miles}{hour}$

Debra can run 82/9 miles per hour.

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Debra can run 20 1/2 miles in 2 1/4 hours. how many miles per hour can she run?

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