ΔABC ~ ΔPQR, ΔABC और ΔPQR के क्षेत्रफल क्रमशः 64 सेमी2 और 81 सेमी2 हैं और AD और PT क्रमशः ΔABC और ΔPQR की माध्यिकाएं हैं। यदि PT = 10.8 सेमी, तो AD = ?

This question was previously asked in
SSC CGL 2020 Tier-I Official Paper 1 (Held On : 13 Aug 2021 Shift 1)
View all SSC CGL Papers >
  1. 9 सेमी
  2. 12 सेमी
  3. 8.4 सेमी
  4. 9.6 सेमी

Answer (Detailed Solution Below)

Option 4 : 9.6 सेमी
vigyan-express
Free
PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
3.6 Lakh Users
25 Questions 50 Marks 10 Mins

Detailed Solution

Download Solution PDF

दिया गया है:

ΔABC ~ ΔPQR

ΔABC का क्षेत्रफल = 64 सेमी2

ΔPQR का क्षेत्रफल = 81 सेमी2

PT = 10.8 सेमी 

AD, ΔABC की माध्यिका है।

PT, ΔPQR की माध्यिका है।

अवधारणा: 

F1 Ashish Madhu 19.10.21 D2

दो समरूप त्रिभुजों के क्षेत्रफलों का अनुपात संगत भुजाओं और माध्यिकाओं के वर्गों के अनुपात के बराबर होता है।

\(\text{Area of (ΔABC)}\over{\text{Area of (ΔPQR)}}\) = \(({AD\over PT})^2\)

गणना:

\(\text{Area of (ΔABC)}\over{\text{Area of (ΔPQR)}}\) = \(({AD\over PT})^2\)

⇒ \(64\over81\) = \(({AD\over PT})^2\) 

​ \(AD\over PT\) = \(\sqrt{64\over81}\) = \(8\over9\)

​ \(AD\over 10.8\) = \(8\over9\)

​ AD = \({8\times10.8}\over9\) = 9.6 सेमी

∴ AD = 9.6 सेमी 

Latest SSC CGL Updates

Last updated on Jun 25, 2025

-> The SSC CGL Notification 2025 has been released on 9th June 2025 on the official website at ssc.gov.in.

-> The SSC CGL exam registration process is now open and will continue till 4th July 2025, so candidates must fill out the SSC CGL Application Form 2025 before the deadline.

-> This year, the Staff Selection Commission (SSC) has announced approximately 14,582 vacancies for various Group B and C posts across government departments.

->  The SSC CGL Tier 1 exam is scheduled to take place from 13th to 30th August 2025.

->  Aspirants should visit ssc.gov.in 2025 regularly for updates and ensure timely submission of the CGL exam form.

-> Candidates can refer to the CGL syllabus for a better understanding of the exam structure and pattern.

-> The CGL Eligibility is a bachelor’s degree in any discipline.

-> Candidates selected through the SSC CGL exam will receive an attractive salary. Learn more about the SSC CGL Salary Structure.

-> Attempt SSC CGL Free English Mock Test and SSC CGL Current Affairs Mock Test.

-> Candidates should also use the SSC CGL previous year papers for a good revision. 

->The UGC NET Exam Analysis 2025 for June 25 is out for Shift 1.

More Triangles, Congruence and Similarity Questions

More Geometry Questions

Get Free Access Now
Hot Links: teen patti master 2025 teen patti - 3patti cards game all teen patti game