Subject
Quantitative Aptitude
Topic
Solution
If (x -1)2= 400, which of the following could b the value of x-5 ?
If (x -1)2= 400, which of the following could b the value of x-5 ?
ক)
15খ)
14গ)
-24ঘ)
-25Explanation
(x -1)2 = 400 or, (x -1)2 = (20)2 or, (x -1) = (+-)20 or, x = (+-)20 + 1 = +21 or -19 Now, x - 5 = +21 - 5 (Taking the positive value) = +16 or, x - 5 = -19 - 5 = -24Related questions
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