Direction and Distance — SSC CGL Reasoning
Direction questions punish exactly one thing: solving in your head. Three turns in, "left" has silently become your left instead of the walker's left, and the answer is 90° wrong — with that wrong answer waiting in the options. The method is non-negotiable: draw the compass once, plot every move, read the result.
1. What SSC actually asks
Tier 1: 1–2 Q · Tier 2: 1–2 Q. Four types: walk-and-turn paths ("walks 5 km south, turns left…"), net displacement ("how far and in which direction from the start?"), shadow questions (morning/evening sun), and rotation questions ("turns 135° anticlockwise…"). Occasionally a clock-dial rotation appears in Tier 2.
2. The compass and the two golden rules
N
NW NE
W E
SW SE
S
Rule 1 — turns are the walker's, not yours. Facing south, a left turn goes east. Track the walker's current facing after every move; write it beside each leg.
Rule 2 — 45° steps for rotations. Clockwise from north: N → NE → E → SE → S → SW → W → NW (45° each). Count steps: 135° clockwise from north = 3 steps = south-east.
3. Net displacement: the coordinate habit
Treat the start as : north , east . Add each leg, then:
Most answers are 3–4–5 or 6–8–10 triangles or a tidy (from equal perpendicular legs). If you get , re-plot — you mis-tracked a turn.
Example: 40 m south, 20 m west, 20 m north → net → m south-west.
4. Shadow questions: two facts only
- Morning (sunrise): sun in the east → shadows fall west.
- Evening (sunset): sun in the west → shadows fall east.
- (Noon: sun overhead — shadows are shortest, falling north in India.)
Then it is pure relative direction: morning, the pole's shadow falls to Gopal's right → shadow points west, west is his right → facing south.
5. Solved PYQ-style examples
Q1. A walks 3 km north, then 4 km east. How far is he from the start? Solution. km (north-east of start).
Q2. Ram walks 5 km south, turns left and walks 3 km, turns left and walks 5 km. In which direction is he from the start? Solution. South 5 → (facing south) left = east 3 → left = north 5. Net: → due east.
Q3. Facing west, a man turns 45° clockwise, then 180°, then 270° anticlockwise. Which direction does he face now? Solution. Net rotation (i.e., 45° anticlockwise from west) → south-west.
Q4. One morning after sunrise, the shadow of a pole fell exactly to Gopal's right. Which direction was Gopal facing? Solution. Morning shadow points west. West on his right → facing south.
Q5. B is 5 km east of A; C is 5 km north of B; D is 5 km south of C. How far and in which direction is D from A? Solution. D lands exactly on B → 5 km east. (Plot it — the north and south legs cancel.)
6. Exam protocol
- Draw the compass cross in the margin before reading the path — N up, every time.
- Write the walker's facing after each turn; "left/right" always belongs to the walker.
- Convert the path to coordinates and expect Pythagorean triples; an ugly root means a plotting error.
- Shadows: morning → west, evening → east. Fix the shadow's absolute direction first, then resolve left/right.
- These are 40-second questions once drawn — and coin-flips if you don't draw. Always draw.
