Subject
Govt.Jobs
Topic
সিকিউরিটি প্রিন্টিং কর্পোরেশন লি. সহকারি ব্যবস্থাপক (সাধারণ)-২৬.১১,২০২১
Find two numbers such that their mean proportional is 6 and third proportional is 20.25.
Find two numbers such that their mean proportional is 6 and third proportional is 20.25.
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4 and 9খ)
3 and 5গ)
5 and 7ঘ)
2 and 5Explanation
সংখ্যাদ্বয় x ও y অতএব ,x/6=6/y বা,xy=36 x=36/y.........(i) আবার x/y =y/20.25 বা,(36/y)/y =y/20.25 বা,36/y²=y/20.25 বা,y³=729 বা,(y)³=9³ বা,y=9 অতএব, (i) x=36/9=4 অতএব ,সংখ্যাদ্বয় 4 ও 9Related questions
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