Question
Amelia walks at a speed of 4 miles per hour. She has already walked 11 miles. After how many additional hours will she have walked more than 30 miles?
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5
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7
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6
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3
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5
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7
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6
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3
Answers
GPT-4o mini
Amelia has already walked 11 miles and wants to walk more than 30 miles.
First, we need to determine how many more miles she needs to walk:
\[
30 \text{ miles} - 11 \text{ miles} = 19 \text{ miles}
\]
Next, we determine how long it will take her to walk those additional 19 miles at a speed of 4 miles per hour:
\[
\text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{19 \text{ miles}}{4 \text{ miles per hour}} = 4.75 \text{ hours}
\]
Since she needs to walk for more than 4.75 hours to exceed 30 miles, we can round this up to 5 hours.
Thus, after 5 additional hours, she will have walked more than 30 miles.
The correct answer is:
**5**
First, we need to determine how many more miles she needs to walk:
\[
30 \text{ miles} - 11 \text{ miles} = 19 \text{ miles}
\]
Next, we determine how long it will take her to walk those additional 19 miles at a speed of 4 miles per hour:
\[
\text{Time} = \frac{\text{Distance}}{\text{Speed}} = \frac{19 \text{ miles}}{4 \text{ miles per hour}} = 4.75 \text{ hours}
\]
Since she needs to walk for more than 4.75 hours to exceed 30 miles, we can round this up to 5 hours.
Thus, after 5 additional hours, she will have walked more than 30 miles.
The correct answer is:
**5**