CUET · MATHS · PYQ PAPER 2025
The speed of water current is half the speed of a motor boat.
The motor boat travels 15 km downstream in 1 hour.
Then the time taken to return to the starting point is:
- A 2 hours
- B 3 hours
- C 4 hours
- D 4.5 hours
Answer & Solution
Correct Answer
(B) 3 hours
Step-by-step Solution
Detailed explanation
\( v_c = 0.5 v_b \) \( v_{down} = v_b + v_c = 1.5 v_b \) \( 1.5 v_b = \frac{15 \text{ km}}{1 \text{ hr}} \Rightarrow v_b = 10 \text{ km/hr}, v_c = 5 \text{ km/hr} \) \( v_{up} = v_b - v_c = 10 - 5 = 5 \text{ km/hr} \)…
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