Boats & Streams · built from real SSC papers

Boats & Streams, the Fast Way

Every question hides just two numbers — the boat's own speed and the stream's speed. Learn the downstream/upstream pair, the half-sum & half-difference trick, and the time-gap shortcuts. Pick any topic to start — nothing is locked.

5 topics · every exam question type

🚣1. Boats & Streams BasicsDownstream = b+s, upstream = b−s; recover boat & stream speed2 types 🧭2. Finding Boat & Stream SpeedFrom up/down data or two journeys, solve for b and s2 types 🔁3. Round Trip & Return JourneyThere-and-back time and the average speed D×U/b2 types ⏱️4. Time Difference (same distance)Same distance each way; the upstream−downstream time gap1 type 🌊5. Two Boats & Multi-stepTwo boats on a river and layered river problems2 types