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06 Nov 2018, 01:44
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A
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Difficulty:
35%
(medium)
Question Stats:
61% (01:03) correct
39%
(01:35)
wrong
based on 173
sessions
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Not Attempted Yet
A circle in the XY-plane has its center at the origin. If M is a point on the circle, what is the sum of the squares of the coordinates of M?
(1) The radius of the circle is 5.
(2) The sum of the coordinates of M is 7.
(1) The radius of the circle is 5.
(2) The sum of the coordinates of M is 7.
eswarchethu135
Updated on: 06 Nov 2018, 19:24
Originally posted by eswarchethu135 on 06 Nov 2018, 02:21.
Last edited by eswarchethu135 on 06 Nov 2018, 19:24, edited 1 time in total.
Last edited by eswarchethu135 on 06 Nov 2018, 19:24, edited 1 time in total.
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Statement 1) The distance between two points is 5. One point is (0,0). No matter what the other point is distance from (0,0) will be x^2+y^2=25. Sufficient.
Statement 2) insufficient
OPTION: A
Statement 2) insufficient
OPTION: A
06 Nov 2018, 04:09
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Bunuel
If we assume the point as (x,y) then the sum of the squares of coordinates is x^2+y^2 .
stat 1 : radius is 5 . That is sqrt[x^2+y^2] = 5 .=> x^2+y^2=25
sufficient .
stat2 : not sufficient
So ans is A .
