Paper 1 · Mathematical Reasoning and Aptitude
Chintan walked 15 km west, turned left and walked 20 km, then moved east and walked 25 km, and finally turning left covered 20 km. How far is he from his starting point?
A20 km
B30 km
C10 km ✓ Correct
DNone of the above
Correct answer: (C) 10 km — He is 10 km from the start, so that is the answer.
Explanation
★He is 10 km from the start, so that is the answer.
★Walking 15 km west and later 25 km east gives a net of 10 km east.
★Turning left from west takes him 20 km south.
★Turning left again from east takes him 20 km north.
★The 20 km south and 20 km north cancel to zero.
★So he is left only 10 km to the east, so he is 10 km from the start.
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