यदि बिंदु (0, k) से रेखा 3x - 4y - 5 = 0 तक खींचे गए लंब का निचला भाग (3, 1) है, तो k का मान क्या है?

This question was previously asked in
NDA (Held On: 6 Sep 2020) Maths Previous Year paper
View all NDA Papers >
  1. 3
  2. 4
  3. 5
  4. 6

Answer (Detailed Solution Below)

Option 3 : 5
Free
NDA 01/2025: English Subject Test
30 Qs. 120 Marks 30 Mins

Detailed Solution

Download Solution PDF

संकल्पना:

यदि दो गैर-ऊर्ध्वाधर रेखाएं एक-दूसरे के लंबवत होती हैं, तो उनके ढलान का गुणनफल -1 होता है। 

अलग-अलग बिंदु (x1, y1) और (x2, y2) से होकर गुजरने वाली एक रेखा का ढलान  है। 

 

गणना:

 

 

बिंदु (0, k) और (3, 1) से होकर गुजरने वाली रेखा का ढलान 

 

3x - 4y - 5 = 0 

⇒4y = 3x - 5

⇒ y =  

इसलिए, रेखा 3x - 4y - 5 = 0 का ढलान 3/4 है। 

अब चूँकि रेखा OP और 3x - 4y - 5 = 0 एक-दूसरे के लंबवत हैं। 

अतः विकल्प (3) सही है। 

Latest NDA Updates

Last updated on Jun 18, 2025

->UPSC has extended the UPSC NDA 2 Registration Date till 20th June 2025.

-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.

->The NDA exam date 2025 has been announced. The written examination will be held on 14th September 2025.

-> The selection process for the NDA exam includes a Written Exam and SSB Interview.

-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100. 

-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential. 

More Distance Formula Questions

More Lines Questions

Hot Links: teen patti master list teen patti real cash game teen patti yes