Sundar runs 20 m towards East and turns to right and runs 10 m. Then he turns…
2022
Sundar runs 20 m towards East and turns to right and runs 10 m. Then he turns to the right and runs 9 m. Again he turns to right and runs 5 m. After this he turns to left and runs 12 m and finally he turns to right and runs 6 m. Now to which direction is Sundar facing?
- A.
North
- B.
West
- C.
East
- D.
South
Attempted by 3 students.
Show answer & explanation
Correct answer: A
Concept
In a direction-sense problem, only the sequence of turns determines the final facing — the distances walked are irrelevant to the direction you end up looking. Use a fixed compass cycle: a RIGHT turn rotates you clockwise (North -> East -> South -> West -> North), and a LEFT turn rotates you counter-clockwise (North -> West -> South -> East -> North).
Application
Sundar first runs towards East, so he begins facing East. Apply each turn in order, ignoring the distances:
Facing East; turns RIGHT -> now facing South.
Turns RIGHT -> now facing West.
Turns RIGHT -> now facing North.
Turns LEFT -> now facing West.
Turns RIGHT -> now facing North.
After the last turn he is facing North.
Cross-check
Three consecutive RIGHT turns from East (East -> South -> West -> North) bring him to North; the next LEFT turn takes him back to West, and the final RIGHT turn returns him to North. The two opposite turns (left then right) cancel, confirming the result: North.