Problem Solving: An airplane bound from Dumaguete City took off from Ninoy Aquino International Airport (NAIA) at 10:20 a.m. Its estimated time arrival in Dumaguete City is at 1330 hrs. The distance from Manila to Dumaguete City is 624 km. 5. What time (in standard time) is the plane supposed to arrive in Dumaguete City? 6. How long is the flight? 7. What is the plane's average speed?