Question

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?

Answer 1

the answer is actually b. 13 hours, 20 minutes. just took the pre test.

Answer 2

Her flight was 9 hours and 20 minutes.

Since 9 A.M. Karachi time is the same as 5 A.M. Warsaw time, we can take the time on her watch, Warsaw time, and subtract 4 to get the Karachi time.

Her watch said she left at 9:40 A.M.  This is Warsaw time.

9:40 - 4 = 5:40 Karachi time.

Her flight took from 5:40 A.M. Karachi time to 3:00 P.M. Karachi time.  This is 9 hours and 20 minutes.