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Call the unknown speed of the current c and the speed of the boat in still water b. When travelling upstream, the net speed of the boat will be b - c and when travelling downstream the net speed of the boat will be b + c. Since b = 4c, the speed upstream will be 3c. The distance upstream is one-half the total travelling distance of 150 km or 75 kilometers. Distance travelled = speed X time at speed, so that upstream time = 75/3c, downstream time = 75/5c, and the sum of these is the total time stated to be 8 hours. Thus 75/3c + 75/5c = 8. Multiplying both sides by 15c yields 75(5 +3) = 120c, or c = (8 X 75)/120 = 5 kilometers per hour.
What else can I help you with?
What is the travel time of 154 miles?
That depends on the speed. After deciding how fast you will travel, divide the distance by the speed to get the time.That depends on the speed. After deciding how fast you will travel, divide the distance by the speed to get the time.That depends on the speed. After deciding how fast you will travel, divide the distance by the speed to get the time.That depends on the speed. After deciding how fast you will travel, divide the distance by the speed to get the time.
When a base is hit the distance it will travel depends on its speed?
When a baseball is hit, the distance it will travel depends on its speed.
How long does it take to travel a distance of 672km at a speed of 96kmh?
what is the speed of pedrothat does it take to travel 672km at 2hrs
What is the mean speed of the Agulhas Current?
The mean speed of the flow of the Agulhas Current is estimated to be 0.5 to 1.4 miles per hour. The current is located in the southwest Indian Ocean.
What is your speed if it takes you 11hours to travel 99km?
No
How did the Tigris river and Euphrates river helped the Mesopotamians travel?
it allowed the Mesopotamians to travel along the rivers allowing them to speed up all travel alongside our on the river
What term describes the speed of the flow of water in a river or a river stream?
velocity
What are some things that can travel faster than the speed of light?
According to current scientific understanding, nothing can travel faster than the speed of light in a vacuum.
Is it possible for a human to travel in light speed?
Not by our current understanding of physics or technology.
How fast do most passenger river boat travel in knots - most river boats around the world travel at the same speed?
Most of the passenger river boat travels at 35 knots per hour.
A river current has a velocity of 5 kmh relative to the shore. A boat moves in the same direction as the current at 4 kmh relative to the river. How do you calculate the velocity of the boat relative?
The velocity of the boat relative to the shore is the vector sum of its velocity relative to the river and the velocity of the river current. In this case, it would be 4 km/h (boat's speed) + 5 km/h (current's speed), which equals 9 km/h.
What do you need to travel at the speed of light?
To travel at the speed of light, you would need to have an infinite amount of energy, which is currently not possible with our current technology and understanding of physics. Additionally, as per the theory of relativity, an object with mass cannot reach the speed of light.
Is it possible to travel faster than light?
According to current scientific understanding, it is not possible to travel faster than the speed of light.
What are the parameters used in shielded metal arc welding?
Arc length, current (amperage,) travel speed, work angle, travel angle.
Is anything faster than the speed of light?
According to current scientific understanding, nothing can travel faster than the speed of light in a vacuum.
Is there anything faster than the speed of light?
According to current scientific understanding, nothing can travel faster than the speed of light in a vacuum.
Is there something faster than the speed of light?
According to current scientific understanding, nothing can travel faster than the speed of light in a vacuum.
