Solve the following question and choose the correct alternative from the…
2023
Solve the following question and choose the correct alternative from the following.
Mohan is facing North and walks 20 km. He turns 270° anti-clockwise and walks 20 km. He again turns 45° clockwise and walks for 20 km. Which direction is he facing now?
- A.
North-West
- B.
South-West
- C.
North-East
- D.
South-East
Show answer & explanation
Correct answer: D
Concept: In direction-sense problems, treat compass bearing as increasing clockwise from North — North = 0°, East = 90°, South = 180°, West = 270°. A clockwise turn of θ° adds θ to the current bearing; an anti-clockwise turn of θ° subtracts θ from the current bearing (taken mod 360°). A bearing between 0° and 90° is North-East, between 90° and 180° is South-East, between 180° and 270° is South-West, and between 270° and 360° is North-West.
Mohan starts facing North, so his initial bearing is 0°.
He turns 270° anti-clockwise: bearing = 0° − 270° = −270°, which is equivalent to 90° (mod 360°) — this is due East.
He then turns 45° clockwise from this heading: bearing = 90° + 45° = 135°.
A bearing of 135° falls strictly between 90° (East) and 180° (South), i.e., in the South-East sector.
Cross-check: an anti-clockwise turn of 270° is the same rotation as a clockwise turn of 360° − 270° = 90°. Turning 90° clockwise from North independently confirms the East heading reached above, and the subsequent 45° clockwise turn from East lands at 135°, i.e., South-East — matching the diagram.

Result: Mohan is facing South-East after the second turn.