Question

If a long-distance runner runs at an average speed of 12 mph for 4.5 hours, how much distance will they have covered?

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Answer 1

`\boxed {\tt 54 \ miles}`

Step-by-step explanation:

Distance can be found by multiplying the speed by the time.

`d=s*t`

The speed is 12 miles per hour and the time is 4.5 hours. Therefore,

`s= 12 \ mi/hr\\t=4.5 \ hr`

Substitute the values into the formula.

`d= 12 \ mi/hr * 4.5 \ hr`

Multiply. Note that that hours, or "hr" will cancel each other out.

`d= 12 \ mi * 4.5`

`d= 54 \ mi`

d= 54 miles

The distance covered is 54 miles.

Answer 2

54 miles.

Step-by-step explanation:

12 times 4.5.