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Boats Streams Formulas, Tricks with Examples - EduDose
A boat traveled downstream a distance of mi. If the speed of the current was 7mph and the total trip took 5 hours and 40 minutes find the average speed of the boat relative to the water. Follow � 3. Add comment.� The total boat speed = (speed of the current) + (speed of the boat Boat Travelling Upstream And Downstream Data relative to current). To do Boat Travelling Upstream And Downstream Mac this problem, then, find the total speed of the boat. Then subtract the current speed to find the speed of the boat relative to the current. Total speed = (Total distance traveled) / (Total time elapsed). 40 minutes = 2/3 hours because there are 60 minutes/hour. Total speed = ( mi) / (5 and 2/3 hours). Total speed = 24 miles/hr. Current speed = 7 miles/hr (per problem description). Quote: 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? A) b) C) D) e) I like to begin with a "word equation." We can write: travel time upstream = travel time downstream + 1/2. Time = distance/rate So, we can replace elements in our word equation to get: 90/(v-3) = 90/(v+3) + 1/2. Now solve for v (lots of work here). Upstream - ��� ���, ��� ��������� � ������ �������� ������� � ������ ����� �� ���Downstream - ����������� �����, ������������� � ������� �������������� ������� � �������� ����������� � �������� ���������� ������ ����.

This a very simple topic and mere require direct application of formulas to solve the question. However, many students find this topic confusing and find face difficulties in solving them. And, the reason for facing such hindrance is the understanding of the language of question. They are just Speed , Distance and Time questions in water rather with a slightly twisted language. Upstream : It means that you are moving in opposite direction from that in which river flows. Example 1: The speed of a motor boat is that of the stream as The boat goes along with the stream in 5 hours and 10 minutes.

How much time will it take to come back? What is the speed of the boat in still water and the speed of the stream? Speed-based questions also include one more type in which time taken and distance covered is given along with speed of stream is given then you can find the speed of the boat in still water using following formula:.

Example 3: A boat take 8 hours to cover a distance while traveling upstream, whereas while traveling downstream it takes 6 hours. What is the speed of the boat in still water? Sol Again direct use of the above formula and you are done.

Example 4: A boat, while going downstream in a river covered a distance of 50 miles at an average speed of 60 miles per hour.

While, returning because of water resistance, it took 1 hour 15 minutes to cover the same distance. What was the average speed during the whole journey?

Sol In this problem we cannot directly use the formula first we need to find the upstream speed and speed in still water. This can be done as follows,. Example 5: A person challenged himself to cross a small river and back. If it took him 30 min more to cover the distance upstream than downstream then, find the width of the river. If a boat takes t hours to row to a place and return back, then the distance between the two places can be estimated through. If in a river running at 1.

Sol To solve this question we will simply use the formula given above. In this case, t is 50 minutes b is 1. The above examples are just few simple and basic application of the methods stated along with them.

These formulas can come in handy and can save lot of your time in exam. You can find questions and problems involving simultaneous use of more than one formula at times. But if you know the correct utilization of them you can solve any problem easily. And, this smoothness comes with practice so the more you varied questions you try the more you will learn and become better at solving them.

So, keep practicing! Enroll Now Rs. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. Downstream : It means moving along in the direction of the flow of the stream.

There can also be other questions in calculation of time and some of them can be easily be solved using the formulas given below. Let d the distance. Sol This question requires direct use of the formula mentioned earlier.

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. Now we are in stage of using the average speed formula. Distance based question: In these kind, you have to calculate distance travelled by the boat when time, speed of still water and stream is given. There can be two different formulas to calculate the distance for two distant cases. If you Like this post then share it!

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