COMEDK2023MathematicsStraight Lines
The distance of the point (3,4) from the line 3 x+2 y+7=0 measured along the line parallel to y-2 x+7=0 is equal to
Options
- A24 5 7
- B3 5
- C23 5 7
- D4 5
Correct answer
A. 24 5 7
Step-by-step solution
The slope of the line, y-2 x+7=0 array ll y =2 x-7 Slope (m) =2 Slope of P Q =m_ P Q =2 Equation of P Q & array (y-4)=2(x-3) On putting, the value of y in Eq. (ii), we get aligned & & 3 x+2(2 x-2)+7 & =0 & & 7 x=-3 & x=- 3 7 aligned Then, y=2 (- 3 7 )-2=- 20 7 So, coordinates of Q= (- 3 7 , -20 7 ) Thus, distance P Q= (3- ( -3 7 )^2 )+ (4- (- 20 7 ) )^2 = 24 5 7