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Janine travelled 1,320 miles on her road trip at an average
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Updated on: 01 Oct 2017, 20:32
Updated on: 01 Oct 2017, 20:32
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Question Stats:
18% (00:56) correct
81% (01:29) wrong based on 48 sessions
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Janine travelled 1,320 miles on her road trip at an average speed of 45 miles per hour.
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
The length of time, in hours, Janine spent driving |
The length of time, in minutes, Janine spent driving to cover the first 2% of her total travel distance |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Re: Janine travelled 1,320 miles on her road trip at an average
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01 Oct 2017, 05:45
01 Oct 2017, 05:45
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Expert Reply
Total distance = 1320 miles.
Average speed is = 45 miles/hour.
Time taken for travel = \(\frac{1320}{45}=29.3333\)hours. (Quantity A)
2% of total distance = \(\frac{2}{100} \times 1320\) miles = 26.4 miles.
Time taken to travel this @ average speed = \(\frac{26.4}{45}=0.58666666666\)hours or 35.2 minutes. (Quantity B)
So numerical value of Quantity B is greater!
Average speed is = 45 miles/hour.
Time taken for travel = \(\frac{1320}{45}=29.3333\)hours. (Quantity A)
2% of total distance = \(\frac{2}{100} \times 1320\) miles = 26.4 miles.
Time taken to travel this @ average speed = \(\frac{26.4}{45}=0.58666666666\)hours or 35.2 minutes. (Quantity B)
So numerical value of Quantity B is greater!
Re: Janine travelled 1,320 miles on her road trip at an average
[#permalink]
01 Oct 2017, 20:42
01 Oct 2017, 20:42
2
sandy wrote:
Total distance = 1320 miles.
Average speed is = 45 miles/hour.
Time taken for travel = \(\frac{1320}{45}=29.3333\)hours. (Quantity A)
2% of total distance = \(\frac{2}{100} \times 1320\) miles = 26.4 miles.
Time taken to travel this @ average speed = \(\frac{26.4}{45}=0.58666666666\)hours or 35.2 minutes. (Quantity B)
So numerical value of Quantity B is greater!
Average speed is = 45 miles/hour.
Time taken for travel = \(\frac{1320}{45}=29.3333\)hours. (Quantity A)
2% of total distance = \(\frac{2}{100} \times 1320\) miles = 26.4 miles.
Time taken to travel this @ average speed = \(\frac{26.4}{45}=0.58666666666\)hours or 35.2 minutes. (Quantity B)
So numerical value of Quantity B is greater!
This is not the right answer,
The option indeed is D.
Since her average speed is given and we do not know what is her actual speed at first 2% of trip so it could be any value for example, she might have driven 60 miles per hour for the first hour and then later traveled slower than 45 miles per hour (suppose 30 m/hr)for a period of time. Because it is not known how much Janine’s speed varied on the trip, the relationship cannot be determined from the information given.
