Question
Download Solution PDFএকটি ঘনকের প্রান্ত 2 সেমি বৃদ্ধি করা হলে এর আয়তন 488 ঘনসেমি বৃদ্ধি পাবে। ঘনকের প্রতিটি প্রান্তের দৈর্ঘ্য কত?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFধরা যাক ঘনকের দৈর্ঘ্যটি হল x সেমি
⇒ 2 সেমি বৃদ্ধির পরে দৈর্ঘ্য হবে = x + 2 সেমি
⇒ প্রাথমিক আয়তন = x3
⇒ প্রান্তের দৈর্ঘ্য বৃদ্ধির পরে আয়তন= (x + 2)3
⇒ (x + 2)3 – x3 = 488
⇒ x3 + 6x2 + 12x + 8 – x3 = 488
⇒ 6x2 + 12x – 480 = 0
⇒ x2 + 2x – 80 = 0
⇒ (x – 8) (x + 10) = 0
⇒ x = 8, -10
⇒ x = 8 সেমি
Last updated on Jun 11, 2025
-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.
-> The UPSC Prelims Result 2025 and UPSC IFS Result 2025 has been released @upsc.gov.in
-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here