WebThe speed of a boat in still water is v.The boat is to make a round trip in a river whose current travels at speed u.. A) Derive a formula for the time needed to make a round trip of total distance D if the boat makes the round trip by moving upstream and back downstream.. Express your answer in terms of the variables D, v, and u.. B) WebThe speed of a boat in still water is 10 miles per hours. If it can travel 26 miles downstream and 14 miles upstream in the same time, find the speed of the current. Solution : Let x be the speed of the current. speed downstream = (10 + x) mph. speed upstream = (10 - x) mph. The formula to find the time : time = distance/speed
SOLUTION: Determine the speed of a motorboat in still water and …
WebPlease Enter Message. Post Message. Boats and Streams Problems with Solutions. Boats and Streams Formulas with examples. The speed of boat in still water is x and speed of stream is y then ratio of time taken in going upstream and downstream is,. Question A boat covers a distance of 14 km upstream and 16 km downstream in 9 hours. WebSince ‘b’ is the speed of the boat in still water, which is = 9 km/hr. Therefore, we have 3r = - (9) or r = -3 km/hr. Neglecting the negative sign as this is the speed of the river, we have the speed of the stream = C) 3 km/hr. Example … raceform books
What is the speed of the river’s current if a boat going 5 mph takes ...
WebThus we found the motorboat speed in still water as 10 miles per hour. Now, determine the trip length by substituting u=10 into the formula L = 3* (10 - 2) = 3*8 = 24 miles. Answer. The motorboat speed in still water is equal to 10 miles per hour. The trip length is equal to 24 miles. Problem 4. Airplane flying into the wind and with the wind WebA boat sails 15 km of a river towards upstream in 5 hours. The speed of river is one-fourth the speed of the boat in still water Formula used: Up stream Speed = X – Y Down stream speed = X + Y where, X = speed of boat Y = speed of stream. Time = distance/speed Calculation: According to the question, Upstream speed = distance/time ⇒ 15/5 = 3 km/hr WebJan 9, 2024 · Formula: Speed in still water (km/hr)= (1 / 2) (a + b) Rate of stream (km/hr)= (1 / 2) (a - b) shoe balls freshener