A motorboat can travel in still water at the speed 15 km/h, while the speed of the current is 3 km/h. Time taken by boat to go 36 km upstream is:
- 2 hr
- 3 hr
- 12 hr
- 18 hr
The Correct Option is B
Solution and Explanation
The boat is moving at \(15\ km/h\) in still water and the current is moving at \(3\ km/h\)
Therefore, the boat's effective speed upstream = \(15\ km/h - 3\ km/h \) = \(12\ km/h\)
Now, Time taken by boat to go 36 km upstream = \(\frac {36\ km}{12\ km/h}\) = 3 hr
So, the correct option is (B): 3 hr.
Top Questions on Miscellaneous
- If \( A \) and \( B \) are binomial coefficients of the 30\(^\text{th}\) and 12\(^\text{th}\) terms of the binomial expansion \( (1 + x)^{2n-1} \), and \( 2A = 5B \), then the value of \( n \) is
- JEE Main - 2025
- Mathematics
- Miscellaneous
- Which of these is aromatic in nature?
- JEE Main - 2025
- Chemistry
- Miscellaneous
- In a resistive circuit, the power dissipated by a resistor \( R \) when a current \( I \) flows through it is given by \( P = I^2 R \). What happens to the power when the current is doubled?
- JEE Main - 2025
- Physics
- Miscellaneous
- What is the shape of the \( \text{ClO}_2^- \) ion according to VSEPR theory?
- JEE Main - 2025
- Chemistry
- Miscellaneous
- Two biased dice are rolled. Out of which one die contains 1, 1, 2, 2, 3, 3, and another die contains 1, 2, 2, 3, 3, 4. Then the probability of getting a sum of 4 or 5 is:
- JEE Main - 2025
- Mathematics
- Miscellaneous
Questions Asked in CUET exam
- The coordination number of the central metal ion in \([ \text{Fe(CN)}_6 ]^{4-}\) is:
- CUET (UG) - 2025
- coordination compounds
- If $ A $ is a $ 2 \times 2 $ matrix and $ |A| = 4 $, then $ |A^{-1}| $ is:
- CUET (UG) - 2025
- Determinants
- The feasible region is bounded by the inequalities: \[ 3x + y \geq 90, \quad x + 4y \geq 100, \quad 2x + y \leq 180, \quad x, y \geq 0 \] If the objective function is $ Z = px + qy $ and $ Z $ is maximized at points $ (6, 18) $ and $ (0, 30) $, then the relationship between $ p $ and $ q $ is:
- CUET (UG) - 2025
- Linear Programming
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. the teacher explained the lesson clearly
Q. so that every student could understand it
R. during the online class yesterday
S. with examples and illustrations- CUET (UG) - 2025
- Sentence Arrangement
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. that maintaining a positive attitude
Q. even in difficult situations
R. is essential for success
S. and helps overcome obstacles effectively- CUET (UG) - 2025
- Sentence Arrangement