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Calculate the average speed of boat in upstream and downstream with the still water speed of 30 km/hr and speed of the stream of 20 km/hr. Solution: Average speed of a boat = ((30 + 20) x (30 � 20)) / 30 = km/hr speed in downstream = 30 + 20 = 50 km/hr speed in upstream = 30 � 20 = 10 km/hr. Speed of the boat in still water = 4(8+ 6)/ (8 � 6) = 4 * 14/2 = 28 km/hr. Average Speed-based question: As the name tells, we need to calculate the average speed of the boat while you are upstream and downstream speed. You can calculate average speed as follows, Average Speed = (upstream speed * downstream speed)/ Boat�s speed in still water. Boats and Streams Questions & Answers for AIEEE,Bank Exams,CAT,GATE, Analyst,Bank Clerk,Bank PO: If sum of upstream and downstream speed of a boat is 82 kmph, and the boat travels km. upstream in 3 hr, Find the time taken by boat to cover If we are The Speed Of The Boat Upstream Controls saying the speed of the boat in still water is 11km/h then the actual difference between upstream vs downstream travel is 20%. A good formula to start with would be. x = speed of river.� Let's say that the boat travels at a constant speed (in and of itself) of x km/h. Then by effect, it is traveling x-2 km/h upstream being slowed by the current, and x+2 km/h downstream. If it travels for 5 and 3h respectively, then the distances covered are 5(x-2) km upstream and 3(x+2) km downstream. Now, naturally, we assume the distance upstream and downstream are equal thus arriving at: [math]5(x-2)=3(x+2) => 5x=3x+6 => 5x-3x=6+10 => 2x=16 => x=8[/math]. The speed of the boat is in and of itself 8 km/h, thus by effect 6km/h Speed Of The Boat Upstream Videos upstream and 10km/h downstream. Speed Upstream = 7 km/hr. Recommended: Please try your approach on {IDE} first, before moving on to the solution. Approach: The direction along the stream is called downstream and the direction opposite the stream is called upstream. So in case of downstream the speeds will be added, while in case of upstream the speeds will be subtracted. The speed of boat downstream is equal to the sum of the speed of the boat in still water and speed of the stream. The speed of boat upstream is equal to the difference of the speed of the boat in still water and speed of the myboat048 boatplans: Speed Downstr. If upstream look 30 min more than downstream time, how much time did the boat travel downstream? a) b) c) d) e) how to solve these kind of questions in 2 min? any short way \frac{90}{(v-3)}=\frac{90}{(v+3)} +1/2 solving for v, value of \frac{90}{(v+3)} is tedious and answer choices are in too close range to make an estimation. how should I be tackling these?� Senior Manager. Joined: 24 Jun Status:Time to step up the tempo.� A boat travelled upstream a distance of 90 miles at an average speed of (v-3) miles per hour and then travelled downstream at an average speed of (V+3) miles per hour. If the trip upstream took half an hour longer than the trip downstream, how many hours did it take the boat to travel downstream?.
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