Question

Please Help please !!! two planes leave Atlanta at 3pm est. one flies east and travels at a speed of 75 kilometers per hour slower than the other plane witch is flying west. by 7 pm est , the planes are 5460 kilometers apart. what is the speed of the plane flying east

Answer 1

Answer:645 kilometers per hour
Solution.
Let v be the speed of the plane flying east!
Then, the speed of the plane flying west is v+75.
Since the planes are 5460 kilometers apart by 7 pm est,
(7-3)*(v+(v+75))=5460
2v+75=1365,
2v=1290,
v=645
answer: 645