# Sebastian runs 1/4 Mile in 1.6 minutes. At this rate, how long will it take him to run one mile??? Help me please

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Jim G. Share
Feb 11, 2017

$6.4 \text{ minutes}$

#### Explanation:

There are 4 ,$\frac{1}{4} \text{of a mile in one mile}$

$\text{That is } 4 \times \frac{1}{4} = 1$

Running at a constant rate, will take 4 times as long.

$\frac{1}{4} \text{mile"to1.6" minutes}$

$1 \text{mile"to4xx1.6=6.4" minutes}$

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1
Feb 14, 2017

$= 6.4 \text{ minutes for 1 mile}$

#### Explanation:

If you were to work out his actual speed in "minutes per mile" that will give you the time to run 1 mile.

("per" means for each, or for 1)

So treating this as a rate question, "minutes per mile" tells us what to divide by what.

$1.6 \text{ minutes for " 1/4 " mile"" } \Rightarrow 1.6 \div \frac{1}{4}$

$1.6 \times \frac{4}{1} \text{ } \leftarrow$ multiply by the reciprocal

$= 6.4 \text{ minutes per mile}$

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