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Boats & Streams - Quantitative Aptitude Questions & Answers | Letsfindcourse
Solution: Downstream speed = Speed in still water + Speed of stream = 7 + 2 = 9 km/hr A couple more formulae, Formula 1: If the ratio of downstream and upstream speeds is D: U, then ratio of time The Speed Of The Boat Upstream Effects taken will be U: D. Question: A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? Solution: When 8 hours 48 minutes is written using mixed fractions, Therefore, the ratio of the time taken becomes Which on solving. 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) speed of boat in still water = y. Speed of boat in upstream = (/12)?60 kmph = 28 kmph. Speed of boat in downstream= (/28)?60 kmph = 36 kmph. In upstream, speed of river and boat cancels down to give total speed. ?x - y = In downstream, speed of river and boat adds up to give total speed. ?x + y = Add both equations.

When we move upstream, our speed gets deducted from the speed of the stream. Similarly when we move downstream our speed gets added. Example 1: A boat travels equal distance upstream and downstream.

What is the speed of the boat in still water? Example 2: A boat travels equal distance upstream and downstream. What is the speed of the current? Example 3: A boat is rowed down a river 28 km in 4 hours and up a river 12 km in 6 hours. Find the speed of the boat and the river. Solution: Downstream speed is ,. Speed of current Downstream�Upstream speed. When the river is running at 1. How far is the place? A man rows a certain distance downstream in X hours and returns the same distance in Y hours.

Example 5: Vikas can row a certain distance downstream in 6 hours and return the same distance in 9 hours. Example 6: Two ferries start at the same time from opposite sides of a The Speed Of The Boat Upstream 8th river, travelling across the water on routes at right angles to the shores. Each boat travels at a constant speed though their speeds are different.

They pass each other at a point m from the nearer shore. Both boats remain at their sides for 10 minutes before starting back. On the return trip they meet at m from the other shore. Find the width of the river. Using i , we get. Using ii ,. Stream: It implies that the water in the river is moving or flowing. Upstream: Going against the flow of the river. Downstream: Going with the flow of the river. Still water: It implies that the speed of water is zero generally, in a lake. Quicker Method to solve the Questions.

Let the required distance be x km. Solution: Let the width of the river be x. Let a, b be the speeds of the ferries. Home G. Maths Reasoning Computer English. Share this page!

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