18.11.2020Author: admin
Dec 18, �� A boat goes 30 km upstream and 44 km downstream in 10 hours [Video] Example 19 In 13 hours, it can go 40 km upstream and 55 km down-stream. Determine the speed of the stream and that of the boat in still water. Jun 12, �� Downstream = (u+v)Km/hr, where �u� is the speed of the boat in still water and �v� is the speed of the stream. Speed of Boat in Still Water = ? (Downstream Speed + Upstream Speed) Speed of Stream = ? (Downstream Speed � Upstream Speed) Average Speed of Boat = { (Upstream Speed ? Downstream Speed) / Boat�s Speed in Stii Water}. 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.
Boats & Streams - Solved Examples - Q 1 - Speed of boat in still water is 16 km/hr. If the speed of the stream is 4 km/hr, find its downstream and upstream speeds.� Q 6 - The speed of river Ganga is 5 km/hr. A motor boat travels 28 km upstream and then returns downstream to the starting point. If its speed in still water be 9 km/hr, find the total journey time. A - 5 hr. = Example 1: A boat travels equal distance upstream and downstream. The upstream speed of boat was 10 km/hr, whereas the downstream speed is 20 km/hr. What is the speed of the boat in still water? Solution: Upstream speed = 10 km/hr. Downstream speed = 20 km/hr. As per formula, Boat�s speed in still water. = Therefore, Boat�s speed in still water. = = Speed of current. = Example 2: A boat travels equal distance upstream and downstream. The upstream speed of boat is 10 km/hr, whereas the downstream speed is 20 km/hr. What is the speed of the current? Solution: Upstream speed = 10 km/hr. Dow. Example 3: A boat running downstream covers a distance of 24 km in 3 hours while for covering the same distance upstream, it takes 6 hours. What is the speed of the current? Sol: The downstream speed = 24/3 = 8 km/hr The upstream speed = 24/6 = 4 km/hr The speed of the current = ()/2 = 4/2 = 2km/hr. Example 4: Speed of the boat in still water
Average Speed Of Boat In Upstream And Downstream Not Work is 15 km/hr and the speed of the current is 7 km/hr.� Example 5: The speed of the boat in still water is 30 km/hr. It goes 75 km downstream and comes back in 9 hours. Find the speed of the
Average Speed Of Boat In Upstream And Downstream Update current. Sol: Let the speed of the current = 'x' km/hr We have 75/(30+x) + 75/(x) = 9 ? 75(60/(x2)) = 9 ? x2 = ? x2 = ? x = 20km/hr. Must Read Boat and Streams Articles. Boats and Streams: Concepts and Theory.
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