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Squares

question 1 of 1 Grade: Ten - G10

Q: Find the square of 15.

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First, calculate the time difference: 135°E to 120°W is a 255° difference (135° + 120°). 255° / 15° per hour = 17 hours. Since we're moving east to west, we subtract time. Tokyo time 10:00 minus 17 hours = 17:00 (5:00 PM) the previous day. However, we cross the International Date Line from west to east when flying this direction, so we ADD one day. Therefore, 17:00 (5:00 PM) Sunday becomes 17:00 (5:00 PM) Monday. Now add flight time: 17:00 Monday + 11 hours = 04:00 Tuesday.

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Did You Know?

First, calculate the time difference: 135°E to 120°W is a 255° difference (135° + 120°). 255° / 15° per hour = 17 hours. Since we're moving east to west, we subtract time. Tokyo time 10:00 minus 17 hours = 17:00 (5:00 PM) the previous day. However, we cross the International Date Line from west to east when flying this direction, so we ADD one day. Therefore, 17:00 (5:00 PM) Sunday becomes 17:00 (5:00 PM) Monday. Now add flight time: 17:00 Monday + 11 hours = 04:00 Tuesday.

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