CUET · MATHS · PYQ PAPER 2025
Ram can row a boat in still water at the rate of 6 km/hr. He finds that it takes him twice as long to row upstream of a river as to row downstream of the same river, then the speed of the current of the river is
- A 5 km/hr
- B 4 km/hr
- C 3 km/hr
- D 2 km/hr
Answer & Solution
Correct Answer
(D) 2 km/hr
Step-by-step Solution
Detailed explanation
\( \frac{D}{v_b - v_c} = 2 \cdot \frac{D}{v_b + v_c} \) \( \frac{1}{6 - v_c} = \frac{2}{6 + v_c} \) \( 6 + v_c = 2(6 - v_c) \) \( 6 + v_c = 12 - 2v_c \) \( 3v_c = 6 \) \( v_c = 2 \text{ km/hr} \)
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