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Mr. E starts from Point A and drives 7 km towards the East. He then takes a left turn, drives 4 km, turns left and drives 22 km. He then ta…

358706Medium DSSSB TGT Computer Science 0 replies 0 views
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Mr. E starts from Point A and drives 7 km towards the East. He then takes a left turn, drives 4 km, turns left and drives 22 km. He then takes a left turn and drives 19 km. He then takes a left turn, drives 6 km, turns left and drives 8 km. He takes a final right turn, drives 9 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again? (All turns are 90 degrees turns only unless specified)
  • A7 km to the North
  • B8 km to the North
  • C6 km to the South
  • D9 km to the South
Correct answer: A

Explanation

Taking East as +x and North as +y, Mr. E moves: 7 E, 4 N, 22 W, 19 S, 6 E, 8 N and the final right turn gives 9 E. He ends at (0, –7), so Point A is 7 km to the North.

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