Elapsed Time — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A Grade 4 family flies from New York at 9:00 AM Eastern. The flight duration is 5 hours, and Mountain Time is 2 hours behind Eastern. What is the arrival time in Mountain Time?
A) 12:00 PM
B) 1:00 PM
C) 2:00 PM
D) 11:00 AM
9:00 AM plus 5 hours equals 2:00 PM Eastern; subtract 2 hours for Mountain time, giving 12:00 PM.
2. An itinerary departs Chicago at 7:30 AM Central with a 4-hour flight to Los Angeles, where the time zone is 2 hours behind Central. What is the local arrival time?
A) 9:30 AM
B) 10:30 AM
C) 11:30 AM
D) 12:30 PM
7:30 AM plus 4 hours equals 11:30 AM Central; subtract 2 hours for Pacific, giving 9:30 AM.
3. A traveler leaves Los Angeles at 6:00 AM Pacific on a 5-hour 30-minute flight to New York, where the time zone is 3 hours ahead. What is the local arrival time? (Use 2 zones; assume 2-hour shift to Mountain only.)
A) 1:30 PM Mountain
B) 11:30 AM Pacific
C) 10:30 AM Mountain
D) 12:30 PM Mountain
6:00 AM plus 5 h 30 min equals 11:30 AM Pacific; add 2 hours for Mountain, giving 1:30 PM.
4. A Grade 4 itinerary departs at 10:15 AM Central and lands after a 3-hour 45-minute trip in a zone 2 hours behind. What is the local arrival time?
A) 12:00 PM
B) 1:00 PM
C) 2:00 PM
D) 11:00 AM
10:15 AM plus 3 h 45 min equals 2:00 PM Central; subtract 2 hours, giving 12:00 PM.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A Grade 4 itinerary departs 9:00 AM Eastern with a 5-hour flight; the destination time zone is 2 hours behind. The local arrival time is 12 :00 PM.
9:00 plus 5 hours equals 2:00 PM Eastern; subtract 2 hours equals 12:00 PM.
2. A flight schedule leaves 8:30 AM with duration 4 h 30 min. Destination time zone is 2 hours behind, so local arrival is 11 :00 AM.
8:30 AM plus 4 h 30 min equals 1:00 PM start zone; subtract 2 hours equals 11:00 AM.
3. An eastward itinerary leaves 7:00 AM with 4-hour duration; destination time zone is 2 hours ahead. Local arrival is 1 :00 PM.
7:00 AM plus 4 hours equals 11:00 AM; add 2 hours for the zone, giving 1:00 PM.
4. A Grade 4 family flies from a 3:00 PM start with a 2 h 30 min duration and a 2-hour westward time zone. Local arrival is 3 :30 PM.
3:00 PM plus 2 h 30 min equals 5:30 PM; subtract 2 hours equals 3:30 PM local.
5. An itinerary departs 11:45 AM with a 3 h 15 min flight; destination time zone is 2 hours behind. Local arrival time is 1:0 PM.
11:45 AM plus 3 h 15 min equals 3:00 PM; subtract 2 hours equals 1:00 PM.