0
The speed of a boat of still water is 11 kmhr it can go 12 km upstream and return downstream to the original point in two hours and forty five minutes Find the speed of the stream?
Wiki User
∙ 15y ago
speed of boat in still water=11 km/hr
distance=12 km
total time= 2 hrs 45 mins = 11/4
let the speed of stream be x and
the time taken by boat in still water be y 12/11=y 12/(11+x) + 12/(11-x)=11/4 (132-12x+12x+132)/121-x2 =11/4 264=1331-11x2/4 1056=1331-11x2 1331-1056=11x2 275=11x2 25=x2 5=x therefore, the speed of the stream is 5 km/hr!
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
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.
A musical statement followed by a contrasting statement and then a return of the original statement would be called?
it is ternary form
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.
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.
Write a function in java that accepts an array of integers and returns the second largest integer in the array Return -1 if there is no second largest?
Method 1: Sort the array in descending order, compare 1st and 2nd if not same , return 2nd if same return -1 Method 2: Find the largest number in the array, initialize another array with dimension 1 less than of original. Copy the array elements from the original array minus the largest element. not select largest from the second array and compare with the previous one if not same return the second largest if same return -1
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.
A motorboat takes 5 hours to travel 300 km going upstream The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?
Velocity = Distance ÷ Time.The speed upstream = 300 ÷ 5 = 60kph.The speed downstream = 300 ÷ 2 = 150 kph.The speed upstream equals boat velocity(Vb) minus current velocity(Vc).The speed downstream equals boat velocity (Vb) pluscurrent velocity (Vc).Vb - Vc = 60Vb + Vc = 150 : Adding the two equations together gives :-2Vb = 210 : Vb = 105, therefore Vc = 45The rate of the boat in still water is 105 kph. The rate of the current is 45 kph.
If you pull water out of one basin and do not return who would it effect more?
The people downstream.
A boat on the Missouri river took 2 hours to go 48 miles downstream. The boat took 3 hours to return the same distance upstream. Find the rate of the boat in still water and the rate of the current.?
Boats speed = 24 miles per hour.Current speed = 4 miles per hour.
Which vampire diaries series should you read the original or The Return?
both but read the original first then the return cause the original leads up to the return series
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.
What do you do when you see a bouy with a number 3 a green light?
This is a channel marker, placed on the edge of a channel. Green markers will always have an odd number on them. If you are heading upstream it should be to your left. If you are heading downstream it should be to your right. It will be opposite a red marker or bouy with an even number on it. To aid in navigating, the term "red, right, returning" is used meaning as you return from open waters (head upstream), the red marker, bouy, sign etc, should be to your right. That means the green one, in your example with a 3 on it, should be to your left. If its on your right side, you are outside the cleared channel area.
What do you do when you see a green lighted bouy with a number 3?
This is a channel marker, placed on the edge of a channel. Green markers will always have an odd number on them. If you are heading upstream it should be to your left. If you are heading downstream it should be to your right. It will be opposite a red marker or bouy with an even number on it. To aid in navigating, the term "red, right, returning" is used meaning as you return from open waters (head upstream), the red marker, bouy, sign etc, should be to your right. That means the green one, in your example with a 3 on it, should be to your left. If its on your right side, you are outside the cleared channel area.
Do you have to file papers in court to report a violation of a restraining order and for not paying child support?
Yes, in both cases you need to return to the court that issued the original orders.Yes, in both cases you need to return to the court that issued the original orders.Yes, in both cases you need to return to the court that issued the original orders.Yes, in both cases you need to return to the court that issued the original orders.
When hot objects cool do they return to their original?
No
What is a Quick Control Non Return Valve?
Quick control NRV is generally a non return valve that has a special mechanism of closing quickly during emergency situations. It has a quicker response than a normal NRV. It is used in places of extreme caution where the downstream fluid should not by any chance return to the equipment concerned. For example it is used downstream a turbine bleed line to prevent high pressure steam from backing into the turbine.
What most directly salmon to swim in a river?
Salmon swim upstream to live out their adult lives. The thing that helps them to swim upstream is purely will power and instinct. They are taught all of their lives to swim to the ocean when they are adults and return to the river where they were born to give birth and die.
