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If a boat travels upstream against a 3 mph current and travels 5 hours and the return trip takes 2.5 hours what is the speed of the boat?
Suppose the speed of the boat is x mph. Then upstream, it travels 5 hours at x-3 mph and so covers 5x - 15 miles.
When going downstream the boat covers the same distance, at x+3 mph, in 2.5 hours so (5x-15)/(x+3) = 2.5
Multiply through by 2*(x+3): 2*(5x-15) = 5*(x+3)
10x - 30 = 5x + 15 or 5x = 45 giving x = 9 mph.
What else can I help you with?
What is current yield?
A current yield is a bond's annual return based on its current price. This is different from its original price and face value.
Heading north with the Gulf Stream a cruise ship traveled 300 miles in 15 hours against the current it took 30 hours to make the return trip what is the speed of the ship in still water?
15 miles
A boat can travel 24 miles downstream in 2 hours and can make the return trip in 3 hours so what is the speed of the boat in still water and the speed of the current?
Whilst travelling downstream the boat travels at V + C mph where V is the speed of the boat in still water and C is the speed of the current. Whilst travelling upstream the speed is V - C mph. The downstream velocity = 24/2 = 12mph = V + C therefore C = 12 - V Velocity (speed) = Distance ÷ Time : therefore Distance = Velocity x Time. As the distance in either direction is the same then, 2(V+C) = 3(V-C) 2V + 2C = 3V - 3C V = 5C : substituting for C as C = 12-V V = 5(12 - V) = 60 - 5V 6V = 60 : V = 10 mph. Therefore, C = 12 - 10 = 2 mph The speed of the boat in still water is 10 mph and the speed of the current is 2 mph.
Is return outwards same as sales return?
no
What is meant by the abbreviation of IRR?
IRR is an abbreviation for the economics term internal rate of return. This is the interest rate compared to the expected profit of project or venture. An IRR is weighed against the cost of capital involved in the venture to determine the feasibility of said venture.
Is there anything unusual about a salmon spawn?
Salmon seem to remember where they were hatched and will attempt to return to the spot. The unusual thing about this is, sometimes it involves swimming,upstream or against the current.
If a boat travels for 5 miles against a 4 mph current It took him 20 minutes longer to get there than it does to return How fast will the boat go on still water?
11 mph
If a motorboat can go 8 miles downstream on a river in 20 mins if the return 8 miles upstream takes 30 minutes what is the speed of the current?
The current is approximately 4 mph.
How can a salmon swims upstream using Newtions Third law of motion?
Fish swim upstream by powerfully thrusting their tails to counteract the current. They are then able to slowly but surely travel upstream.
If the current flows at 2 mph and it takes me 3 hrs. to row 9 miles upstream how long will it take for me to return?
To find how long it will take to return downstream, first determine the effective speed while rowing upstream. The current speed is 2 mph, so your effective speed upstream is your rowing speed minus the current. If it takes 3 hours to row 9 miles upstream, your rowing speed is 5 mph (since 9 miles / 3 hours = 3 mph, and 3 mph + 2 mph = 5 mph). While returning downstream, your effective speed will be 5 mph + 2 mph = 7 mph. Thus, it will take 9 miles / 7 mph = approximately 1.29 hours, or about 1 hour and 17 minutes, to return downstream.
What river has the nickname of River of no return?
The "River of No Return" is the nickname of a branch of the Salmon River in central Idaho. The river is famous for its strong rapids. The Lewis and Clark Expedition of 1805 was told that if they made it down this river, they would never be able to make it back upstream against the current. Without a motorboat, this still holds true today.
An airplane travels 700 miles against the wind in 5 hours and makes the return trip with the same wind in 2 hours Find the rate of the wind?
105 mph
Will Ronnie return to eastenders?
There are no current plans for her to return.
When will Ronnie return to Eastenders?
There are no current plans for her to return.
Is there actually current flowing through the return wire?
Yes, there is a current flow through he return wire in a closed circuit. The only time there is no current flow through the return wire is when the circuit is open.
A boat can travel from its dock to a town downriver with a 7 mph current in 10 hours The return trip against the same current takes 15 hours What is the speed of the boat in still water?
35 mph
A boat can travel from its dock to a town downriver with a 7 mph current in 10 hours. The return trip against the same current takes 15 hours. What is the speed of the boat in still water?
35 mph
