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Esther was facing S 20° W. She turned 90° in the clock wise direction. What...

Mathematics
WAEC 2011

Esther was facing S 20° W. She turned 90° in the clock wise direction. What direction is she facing?

  • A. N 70o W
  • B. S 70o W
  • C. N 20o W
  • D. S 20o E
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Correct Answer: Option A
Explanation

The bearing S 20° W is equivalent to a bearing of 200°.

Moving clockwise 90° ⇒ 200° + 90°

= 290°

This is equivalent to N 70° W.


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