PuzzlersWorld.com

  • Hacker Puzzle
  • Interview Puzzles
  • Number Puzzles
  • Maths Puzzles

Average speed of train

(3 votes, average: 4.33 out of 5)

May 17, 2014 by puzzler 5 Comments

average speed of train puzzle

average speed of train puzzle

A train is going at a speed of 60kmph towards Delhi and returned back at a speed of 30kmph. What is its average speed?

Check your answer:-

Tried enough already?
Click here to See SolutionHide Solution
We will go with this simple formula to calculate average speed of the train

Average Speed = (Total Distance/Time Taken);
Lets assume the distance traveled by train in one direction is x, and time taken while going towards delhi is t1, while it took t2 time while coming back from Delhi.

We can say
x/t1 = 60
x/t2 = 30
Total Average speed = 2x/(t1 + t2)
average speed = 2x /(x/60+x/30) = (2x/90x)*60*30 = 40

  • Share on Whatsapp
  • Share on Facebook
  • Share on Twitter
Facebook Comments
Next Puzzle
Find Number present only once

Checkout more Interview Questions Tags: Snapdeal Interview Questions, Solved Puzzles

Comments

  1. Nisha says

    May 4, 2015 at 3:57 pm

    40KMPH

    Reply
  2. HVG says

    December 18, 2014 at 3:08 pm

    Let the distance between Place to Delhi be X.

    So the total distance distance = X+X = 2X

    Now time taken for first travel from A to Delhi = X/60 hours
    Time taken while coming from Delhi to A = X/30 hours

    Total time taken for the to and fro journey = (X/60) + (X/30) hours = (3X/60) hours

    Average speed = Total Distance / Total Time
    = (2X) / (3X/60) KMPH
    This gives X = 40 KMPH

    Answer = 40KMPH

    Reply
  3. Prabhakar Singh says

    August 19, 2014 at 5:19 pm

    40 kmph using formula 2xy/(x+y)

    Reply
  4. nitin says

    July 20, 2014 at 12:36 pm

    45 kmph

    Reply
  5. Rony Saha says

    July 13, 2014 at 11:59 am

    40kmph

    Reply

Leave a Comment Cancel reply

Submit your Puzzle

You may also like

  • Card Game solution: Facebook hacker cup 2013 Round1
  • Reverse a link list without using another
  • Osmos Solution: Google codejam 2013 Round 1B
  • Cookie Clicker Alpha Solution – Google Code Jam 2014
  • Find the Min solution: Facebook hacker Cup 2013 Qual Round
  • RoboElection solution: Facebook hacker cup 2013 Round 2
  • Balanced Smileys solution: Facebook hacker Cup 2013 Qual Round
  • Full Binary Tree Solution – Google Code Jam
  • Objective Questions set C/C++ – Part 6
  • 3 SUM problem

Categories

  • Aive hi Puzzles
  • Akbar and Birbal
  • Alphabetical Puzzles
  • Bollywood Puzzles
  • Google Code jam
  • Hindi Riddles
  • Interview Puzzles
  • Interview Questions
  • Logical Puzzles
  • Malayalam Puzzles
  • Maths Puzzles
  • Miscellaneous
  • Number Puzzles
  • Picture Puzzles
  • Riddles
  • Tamil Puzzles
  • Technical

Social

  • View puzzlersworld’s profile on Twitter
privacy policy

Copyright © 2023 · eleven40 Pro Theme on Genesis Framework · WordPress · Log in

  • Hacker Puzzle
  • Logo Puzzles
  • Optical Illusions
  • WhatsApp Puzzles
  • Picture Puzzles
  • Riddles
    ▼
    • Hindi Riddles
  • Bollywood Puzzles
  • Alphabetical Puzzles
  • Aive hi Puzzles
  • Interview Puzzles
  • Logical Puzzles
  • Interview Questions
    ▲
    • Data Structures
    • Binary Tree
    • Algorithms
    • Recursion Questions
    • Amazon Interview Questions
    • Snapdeal Interview Questions
    • Google Code jam
  • Technical
  • Akbar and Birbal
  • Number Puzzles
  • Maths Puzzles
  • Miscellaneous