Speed upstream = Speed of boat - Speed of current. Speed downstream = Speed of boat + Speed of current. For a constant distance, Time Speed = Distance. By equating the distance for upstream and downstream journeys, a relationship between the boat speed and current speed can be found.
A boat running upstream takes 6 hours 30 minutes to cover a certain distance, while it takes 3 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current, respectively?
Asked in GPSC Prelims CSP 1 2021 · Topic: Mechanics (Fluid Statics and Dynamics (Continuity Equation, Bernoulli's Theorem))
More Physics questions
- Water is flowing at the rate of 12 km per hour through a pipe of diameter 14 cm into a rectangular tank which is 60 m long and 33 m wide. Find the time in which the level of water in the tank will rise by 28 cm.
- An object weighs maximum in
- Consider the following statements : Statement-I: Assertion (A) : The stream of water flowing at high speed from a garden hose pipe tends to spread like a fountain when held vertically up, but tends to narrow down when held vertically down. Statement-II: Reason (R) : In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant. Choose the correct answer from the options given below :
- $\frac{p}{\rho} + hg + \frac{1}{2} = \text{constant}$ is the mathematical statement of ___.
- A deep sea diver may hurt his ear drum during diving because of
- A container is first filled with water and then the entire water is replaced by mercury. Mercury has a density of 13·6 × 10³ kg/m³. If X is the weight of the water and Y is the weight of the mercury, then
- Whether an object will float or sink in a liquid, depends on
- Which of the following statements about a fluid at rest in a cup is/are correct ? 1. Pressure is same at all the points in the fluid. 2. Pressure is exerted on the walls. 3. Pressure exists everywhere in the fluid. Select the correct answer using the code given below :
