A flight leaves Chennai late at night at the time on clock A (Indian time) and lands in Singapore the next morning at the time on clock B (Singapore time, 2 h 30 min ahead of India). How long is the flight?

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4 h 15 min. A shows 11:40 p.m. and B shows 6:25 a.m. Singapore time. In Indian time the landing is 6:25-2:30=3:55 a.m. From 11:40 p.m. to 3:55 a.m. is 4 h 15 min. (6 h 45 min ignores the time difference; 9 h 15 min adds it.)

A flight leaves Chennai late at night at the time on clock A (Indian time) and lands in Singapore the next morning at the time on clock B (Singapore time, 2 h 30 min ahead of India). How long is the flight?

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