Question 8142
If two planes leave an airport at 1:00pm, how far in distance will they be at 3:00pm if one plane drove directly North 150mph and the other drove directly west 200mph?

after two hours of journey they will be at a distance of 300miles anf 400miles respectively from the airport.

drawing a map for this situation will give a right angled triangle.

The distance between the two planes is the hypotenus of the triangle.

so the distance between the planes is square root(300^2 + 400^2) which is 500miles.

so the planes are at 500miles from each other.