Boats and Streams Example 3


Boats and Streams shortcut tricks are very important thing to know for your exams. Time takes a huge part in competitive exams. If you manage your time then you can do well in those exams. Most of us miss this thing. Here in this page we give few examples on Boats and Streams shortcut tricks. We try to provide all types of shortcut tricks on boats and streams here. Visitors are requested to carefully read all shortcut examples. You can understand shortcut tricks on Boats and Streams by these examples.

Before doing anything we recommend you to do a math practice set. Then find out twenty math problems related to this topic and write those on a paper. Using basic math formula do first ten maths of that page. You also need to keep track of Timing. After solving all ten math questions write down total time taken by you to solve those questions. Now read our examples on boats and streams shortcut tricks and practice few questions. After finishing this do remaining questions using Boats and Streams shortcut tricks. Again keep track of the time. This time you will surely see improvement in your timing. But this is not all you want. You need more practice to improve your timing more.

You all know that math portion is very much important in competitive exams. It doesn’t mean that other topics are not so important. But if you need a good score in exam then you have to score good in maths. You can get good score only by practicing more and more. All you need to do is to do math problems correctly within time, and this can be achieved only by using shortcut tricks. But it doesn’t mean that you can’t do math problems without using any shortcut tricks. You may have that potential that you may do maths within time without using any shortcut tricks. But so many other people may not do the same. For those we prepared this boats and streams shortcut tricks. We try our level best to put together all types of shortcut methods here. But we may miss few of them. If you know anything else rather than this please do share with us. Your little help will help so many needy.

Boats and Streams Example 3
This is the basic theory of Boat and Stream which is applied in question to obtain answers here Boat and Stream Methods of example in different form of examples.

In maths exam papers there are two or three question are given from this chapter.This type of problem are given in Quantitative Aptitude which is a very essential paper in banking exam.Under below given some more example for your better practice.

 

 


Example #1
The speed of a boat in still water is 18 km/hr and the rate of current is 6 km/hr. What distance will the boat covers in downstream in 14 minutes?

  1. 4.2 km
  2. 5.6 km
  3. 6.8 km
  4. 7.4 km

Show Answer Show How to Solve Open Rough Workspace

Answer: Option (B)
How to Solve
Speed in downstream,
= (18 + 6)
= 24 km/hr.

Distance passes,
= (24 x 14 / 60)
= 5.6 km.

Rough Workspace

Example #2
Speed of a boat in still water is 12 km/hr and the speed of the stream is 4 km/hr. A boy row to a place, which is 80 km away and then he return back to the place where he started. Find the total time required to cover the total distance.

  1. 15 hours
  2. 17 hours
  3. 20 hours
  4. 24 hours

Show Answer Show How to Solve Open Rough Workspace

Answer: Option (A)
How to Solve
Speed of Upstream,
12 – 4 = 8 km/hr.

Speed of Downstream,
12 + 4 = 16 km/hr.

So, total time taken is,
( 80 / 8 ) + ( 80 / 16 )
= 15 hours.

Rough Workspace

Example #3
A man can row upstream at 10 km/hr and downstream at 18 km/hr. What is the speed of the stream?

  1. 2 km/hr
  2. 4 km/hr
  3. 6 km/hr
  4. 8 km/hr

Show Answer Show How to Solve Open Rough Workspace

Answer: Option (B)
How to Solve
Speed of the stream is,
= 1 / 2 (a – b )
= 1 / 2 ( 18 – 10 )
= 4 km/hr.
Rough Workspace

Example #4
A boat can travel with a speed of 14 km/hr in still water. If the speed of the stream is 4 km/hr, then find the time taken to go 72 km downstream.

  1. 1 hours
  2. 2 hours
  3. 4 hours
  4. 6 hours

Show Answer Show How to Solve Open Rough Workspace

Answer: Option (C)
How to Solve
Speed of downstream is,
( 14 + 4 )
= 18 km/hr

Time taken to travel 72 km downstream is,
= 72 / 18
= 4 hours.

Rough Workspace

Example #5
If a steam boat goes 8 km upstream in 40 minutes and the speed of stream is 5 km/hr, then in still water what would be the speed of the boat?

  1. 11 km/hr
  2. 13 km/hr
  3. 15 km/hr
  4. 17 km/hr

Show Answer Show How to Solve Open Rough Workspace

Answer: Option (D)
How to Solve
Rate of stream is,
= 8 x 60 / 40 [ convert minutes to hour we multiplying by 60 ]
= 12 km/hr.

Speed of stream is 5 km/hr.
Let, speed in still water be X km/hr.

If stream speed 5 km then speed of upstream would be,
= ( X – 5 ) km/hr.

So, X – 5 = 12
X = 12 + 5
X = 17 km/hr.

So, speed of the boat is 17 km/hr.

Rough Workspace

Few examples of Boats and Streams with Shortcut Tricks

 

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17 comments

  1. sandhya says:

    A man can row 7 km/hr in still water. If the river is running at 3km/hr,it takes 6hrs more in upstream then go to downstream for the same distance how far is the place?pls give me the. Solution

    • KSV says:

      10*X=4*(X+6); Hear X is time taken to reach that place in down stream.
      X=4hours;
      Total one way distance is total speed(person’s+ stream)*time taken.
      I.e 10*4=40km.

    • DnH says:

      u won’t complicate it .
      take
      speed of stillwater (u) =7km\hr
      speed of water (v) = 3km\hr
      to find : distance of d.s and u.s
      downstream(a)=u+v=11km\hr
      upstram (b) =u-v=4km\hr.
      take diffferece =11-4=7 * 6hrs is answer

  2. shubham says:

    The speed of a boat in the still water in 10 Kmph. if it can travel 26 Km downstream and 14 km upstream in the same time, the speed of stream is

    • arthi says:

      hi shubham!!!
      There is a formula
      speed of boat in still water=rate of stream(upstream+downstream/upstream-downstream)

      x—- rate of stream

      10=x(40/12)
      10=x(10/3)
      3=x
      x=3

      speed of the stream is 3

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