Speed of a boat in still water is 18 km/hr and the speed of stream is 7 km/hr. What is the upstream speed (in km/hr) and downstream speed (in km/hr) of the boat?
शांत जल में एक नाव की गति 18 कि.मी./घंटा है तथा धारा की गति 7 कि.मी./घंटा है। नाव की धारा के प्रतिकूल (Upstream) गति (कि.मी./घंटा में) तथा धारा के अनुकूल (Downstream) गति (कि.मी./घंटा में) क्या है?
Answer और ExplanationAnswer and explanation
Answer: (B) 11, 25
U = 18 − 7 = 11 km/h
D = 18 + 7 = 25 km/h
✓
उत्तर 11, 25 है।
U = 18 − 7 = 11 km/h
D = 18 + 7 = 25 km/h
✓
The answer is 11, 25.
SMART APPROACH
U + D = 2b = 36। सिर्फ़ 11 + 25 = 36 है, तो 11, 25।
U + D = 2b = 36. Only 11 + 25 = 36, so 11, 25.
Source: MTS · 18 Feb 2025 · Shift 1। Solution: Prashant Sir, Vijayastra।Source: MTS · 18 Feb 2025 · Shift 1. Solution by Prashant Sir, from Vijayastra.