Two airplanes leave an airport at the same time. the velocity of the first airplane is 700 m/h at a heading of 31.3 the velocity of the second is 570 m/h at the heading of 134° how far apart are they after three hours?

Here in order to find out the distance between two planes after 3 hours can be calculated by the concept of relative velocity

here

speed of first plane is 700 mi/h at 31.3 degree

speed of second plane is 570 mi/h at 134 degree

now the relative velocity is given as

now the distance between them is given as

so the magnitude of the distance is given as

miles

so the distance between them is 2985.6 miles

the part of the wave he is travelling on is the crest

so easy. just google the electromagnetic waves and it’ll pop up.