Posted by **amanda** on Friday, April 8, 2011 at 3:21am.

at noon two planes leave at 3,377mi apart and are coming toward each other at a parallel line if one travels at 610mph and the other 618mph how long will it take to reach each other

- math -
**Jai**, Friday, April 8, 2011 at 3:28am
recall that speed is distance travelled per unit time, or

v = d/t

since they are travelling towards each other, we add their speeds (since travelling towards each other consumes less time for them to meet than travelling in the same direction)

substituting,

v = d/t

610 + 618 = 3377/t

1228 = 3377/t

1228*t = 3377

t = 3377/1228

t = 2.75 hours

hope this helps~ :)

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