Quantitative Aptitude Ques 546
Question: Coordinates of a point is (0, 1) and ordinate of an another point is $ -3. $ If the distance between the points is 5, then abscissa of second point is [NICL (AAO) 2014]
Options:
A) 3
B) $ -,3 $
C) $ \pm 3 $
D) 1
E) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
- Let abscissa be x. Then, $ \sqrt{{{(x-0)}^{2}}+{{(-,3-1)}^{2}}}=5 $
$ \Rightarrow $ $ (x^{2})+{{(-,4)}^{2}}=25 $
$ \Rightarrow $ $ x^{2}=25-16=9 $
$ \Rightarrow $ $ x=\pm ,3 $