Two planes start from los angeles international airport and fly in opposite directions. the second plane starts 1/2 hour after t
he first plane, but its speed is 60 kilometers per hour faster. find the airspeed of each plane if 2 hours after the first plane departs, the planes are 3135 kilometers apart.
Let x = first plane's speed. We have the equation: 2 hours * x km/h + 1.5 hours * (x+60) km/h = 3135 km. 3.5 hours*x km/h + 90 km = 3135km 3.5hours*x km/h = 3045km x = 870 km/h. The first plane is traveling at 870 km/h, therefore since it is 60 km/h faster, the second plane is traveling at 930 km/h.
