Q45: An airplane maintains a speed of km/h relative to the air it is flying through as it makes a trip to a city km away to the north.
(a) What time interval is required for the trip if the plane flies through a head- wind blowing at km/h toward the south?
(b) What time interval is required if there is a tailwind with the same speed?
(c) What time interval is required if there is a crosswind blowing at km/h to the east relative to the ground?