Subject
Bank Exam
Topic
Joint Recruitment Test for 8 Banks (SO) [03-09-2019, AUST
[ Read the following questions carefully and choose the right answer. ]The respective ratio between the speed of a car, a train and a bus is 5 9 4. The average speed of the car, bus and train is 72 km/hr together . What is the average speed of the car and the train together ?
[ Read the following questions carefully and choose the right answer. ]The respective ratio between the speed of a car, a train and a bus is 5 9 4. The average speed of the car, bus and train is 72 km/hr together . What is the average speed of the car and the train together ?
ক)
82 km/hখ)
72 km/hগ)
67 km/hঘ)
84 km/hExplanation
প্রশ্নে বলা হচ্ছে গাড়ি, ট্রেন এবং বাসের গতিবেগের অনুপাত 5 9 4 . ঐ তিনটি যানের গড় গতিবেগ 72 kmph হলে গাড়ি ও ট্রেনের গড় গতিবেগ কত ? ধরি, গাড়ি, ট্রেন এবং বাসের গতিবেগের অনুপাত যথাক্রমে 5x, 9x এবং 4x kmph প্রশ্নমতে, 5x+9x+4x/3 = 72 => 18x = 72×3 ∴ x = 72×3/18 = 12 অতএব, গাড়ির গতিবেগ = 5×12 = 60 kmph এবং ট্রেনের গতিবেগ = 9×12 = 108 kmph গাড়ি ও ট্রেনের গতিবেগের সমষ্টি = 60+108 = 168 kmph গড় গতিবেগ = 168/2 = 84 km/hRelated questions
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