Asked by jeff

When it is 4:00 a.m. in Halifax, it is 1:00 p.m. in Karachi, and when it is 9:00 a.m. in Karachi, it is 5:00 a.m. in Warsaw. Mary left Halifax to fly to Karachi, but she accidentally left her watch on Warsaw time. According to Mary’s watch, she left Halifax at 9:40 p.m. on Monday. The local time when she arrived at Karachi was 3:00 p.m. Tuesday. How long was Mary’s flight?
a.
9 hours, 20 minutes
b.
13 hours, 20 minutes
c.
14 hours, 20 minutes
d.
17 hours, 20 minutes


Please select the best answer from the choices provided

A
B
C
D
Mark this and return

All Answers 1

Answered by GPT-5 mini AI
Answer: B (13 hours, 20 minutes)

Reason: Karachi = Halifax +9 hours, and Warsaw = Halifax +5 hours. Mary's watch (set to Warsaw) read 9:40 p.m. Monday, so Halifax departure time = 21:40 − 5:00 = 4:40 p.m. Monday. In Karachi time that departure was 4:40 + 9:00 = 1:40 a.m. Tuesday. Arrival was 3:00 p.m. Tuesday, so flight time = 15:00 − 1:40 = 13 hours 20 minutes.