Downstream & Upstream
धारा के साथ, धारा के ख़िलाफ़
title
Downstream & Upstream
- Boats & Streams
- Downstream & Upstream
नमस्ते दोस्तों! MeraExam में आपका स्वागत है। आज का topic है — धारा के साथ, धारा के ख़िलाफ़। मैं promise करती हूँ, आज के बाद ये topic आपको आसान लगेगा। शुरू करें?
Scene 1/13
Interactive — learn by doing. Drag, tap and explore to build the intuition.
The current adds one way, fights the other
Downstream the stream pushes you (b + s); upstream it holds you back (b − s). Boat speed is their average; stream is half their difference.
12
downstream ↓ (b + s)
8
upstream ↑ (b − s)
b = (↓ + ↑)/2 = (12 + 8)/2 ; s = (↓ − ↑)/2
b = 10, s = 2
Given the two speeds, recover boat and stream by average and half-difference.