Like 6 minutes or somthin
We have a ratio of 3 hours / 7.5 miles
We want to know how many miles he can walk in 1 hour so, divide both sides by 3 -> 1 hour / 2.5 miles
He is walking at 2.5 mph
<span>1 hour and 1/3rd of an hour
</span>
so A is right
It will take 7/8 of a minute because you just multiply 1/8 by 7
Hope this helps the answer is 2 1/8 the picture explains how i did it :)