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    a car travels 3 km in 10 minutes to reach the destination. on the return journey, the car travels the same distance in 15 minutes. what is the average speed of the car in its entire journey?

    Mohammed

    Guys, does anyone know the answer?

    get a car travels 3 km in 10 minutes to reach the destination. on the return journey, the car travels the same distance in 15 minutes. what is the average speed of the car in its entire journey? from screen.

    A car travels the first one third of a certain distance with a speed of 10 km/hr, the next one third with a speed of 20 km/hr and the last one third distance with a speed of 60 km/hr The average speed of the car for the whole journey is

    Click here👆to get an answer to your question ✍️ A car travels the first one third of a certain distance with a speed of 10 km/hr, the next one third with a speed of 20 km/hr and the last one third distance with a speed of 60 km/hr The average speed of the car for the whole journey is

    Question

    A car travels the first one third of a certain distance with a speed of 10 km/hr, the next one third with a speed of 20 km/hr and the last one third distance with a speed of 60 km/hr The average speed of the car for the whole journey is

    A

    18 km/hr

    B

    24 km/hr

    C

    30 km/hr

    D

    36 km/hr

    Medium Open in App

    Updated on : 2022-09-05

    Solution Verified by Toppr

    Correct option is A)

    Let the total distance travelled be x km Then total time taken =

    10 x/3 ​ + 20 x/3 ​ + 60 x/3 ​ = 30 x ​ + 60 x ​ + 180 x ​ = 180 6x+3x+x ​ = 180 10x ​ = 18 x ​

    hrs Then average speed = =

    Totaltimetaken

    Totaldistancetravelled

    ​ = x/18 x ​ km/hr = 18 km/hr

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    स्रोत : www.toppr.com

    A car travels a certain distance at 24 km/h and comes back at 36 km/h. What is the average speed of the car for the total journey.?

    Answer (1 of 9): It is the harmonic mean of 24 and 36 gives the avg speed in the total journey and hence it is 2/{(1/24)+(1/36)}=144/5=28.8 kmph. Ans..

    A car travels a certain distance at 24 km/h and comes back at 36 km/h. What is the average speed of the car for the total journey.?

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    Sort Jayanth Mankavil

    Studied at Little Flower English Medium School, Nilambur3y

    Here is a simple equation

    V average = 2V1V2/(V1+V2)

    Here V1 = 24km/hr V2= 36km/hr

    Substitute these values in the equation, you will be getting 28.8km/hr as the answer.

    Related questions

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    A car travels a distance of 100km at the speed of 25 km/h. It covers the next 25 km of its journey at the speed of 5 km/h and the last 50 km of its journey at the speed of 25 km/h. What is the average speed of the car?

    Rahul Rai

    B. Tech from G.B Pant University of Technology, Pantnagar, Uttarakhand (Graduated 2018)3y

    Ans is 28.8 km/h.

    Assume the distance for one side is ‘s’. Therefore the total time taken for forward and backward journey is (s/24)+(s/36) which equals 5s/72.

    Av speed = total distance /total time

    Here total distance is 2s (forward and backward)

    So, av speed= 2s/(5s/72) which equals 28.8 km/hr.

    Pandita Rahul

    Lived in Anantnag, Jammu and Kashmir, IndiaAuthor has 231 answers and 514.7K answer views3y

    Use formula 2xy/x+y, where x and y speeds

    Avg speed= 2×24×36/24+36=48×36/60=28.8 km/hr

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    Abhilash Kumar

    Design Engineer (2018–present)3y

    where s s

    equals the average speed,

    a a

    equals the speed for the first half of the distance, and

    b b

    equals the speed for the second half of the distance

    Therefore, s=(2*24*36)/(24+36)

    s=28.8 Kph

    (Source:How to Calculate Average Speed

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    Let the distance be x, the time taken for going =x/24 and the time taken for coming back is x/36. Therefore the total time taken is x/24+x/36= 5x/72. In this time, the car covered 2x distance (going and coming back). Therefore average speed = 2x/(5x/72)=144/5= 28.8km/h

    Peter Valentine

    Former Retired, former Engineering Company directorAuthor has 984 answers and 259.1K answer views4y

    Related

    A car at an average speed of 80 km/h for 2 hours. What distance does the car travel?

    One has to wonder at someone who posts on here is unable to simply multiply 80 by 2.

    HsBadarinath

    Ph.D. in Civil Engineering. Maths keeps one mentally active.Author has 52.8K answers and 33.3M answer views3y

    Factors of 24 = 2x2x2x3 36 = 2x2x3x3

    LCM = 2x2x2x3x3 = 72

    Suppose the journey is 72 km long.

    The car cover the outward journey in 72/24in 3 hours.

    The return journey takes 72/36 = 2 hours.

    So the average speed = (total distance covered)/(total time of travel)

    = (72+72)/(3+2) = 144/5

    = 28.2 km/hr. Answer.

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    Quora isn’t here to do your homework.

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    How many minutes in an hour? So it covers 45 Km in that number of minutes. So what distance will it cover in 1/30 (or 2/60 ) of that?

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    [Solved] A car covers the first 78 km. of the journey in 90 minutes a

    Given: Total Distance cover = 78 + 50 = 128 km Total time taken = 90 + 70 = 160 minutes = \(160\over 60\) hours Formula use: Average speed = Total

    Home Quantitative Aptitude Speed Time and Distance Average Speed

    Question

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    A car covers the first 78 km. of the journey in 90 minutes and the remaining 50 km. in 70 minutes. What is the average speed of the car?

    This question was previously asked in

    Kerala SET Paper 1: Held on February 2017

    Download PDF Attempt Online

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    50 km/hour 48 km/hour 40 km/hour 55 km/hour

    Answer (Detailed Solution Below)

    Option 2 : 48 km/hour

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    Detailed Solution

    Download Solution PDF

    Given:

    Total Distance cover = 78 + 50 = 128 km

    Total time taken = 90 + 70 = 160 minutes =

    16060 hours

    Formula use:

    Average speed = Total Distance Travelled / Total Time taken

    Calculation:

    Average speed = 12816060 Average speed = 128160×60

    Average speed = 48 km/hour

    Therefore, the average speed of the car is 48 km/hour.

    Hence, the correct answer is 48 km/hour.

    Download Solution PDF

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    स्रोत : testbook.com

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    Mohammed 10 day ago
    4

    Guys, does anyone know the answer?

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