Official Quant thread for CAT 2013

@dreamz007 said:
PROVIDE SOLUTION FOR THE SUM :GIVEN IN THE LINK : http://snag.gy/4ryF9.jpg
29) (5) ???
@piyushrohella12 solve for 30 !! 😃
yup for 29 its option 5
@dreamz007 said:
PROVIDE SOLUTION FOR THE SUM :GIVEN IN THE LINK : http://snag.gy/4ryF9.jpg
X processes black and Y processes brown...
so after 90 hrs 360 litres of each dye is made
now only 40 litres of black is left...
now both X and Y work on brown with a speed = 7 litres/hr
90 + 40/7 = 95 and 5/7
Find the largest value of y/x if x² + y² - 2x + 4y - 19 = 0.
@dreamz007 said:
PROVIDE SOLUTION FOR THE SUM no. "30" !!! :GIVEN IN THE LINK : http://snag.gy/4ryF9.jpg

30) 10days
@Dexian yup cn u show
@techgeek2050 said:
Find the largest value of y/x if x ˛ + y ˛ - 2x + 4y - 19 = 0.
approx 3.??
@techgeek2050 said:
Find the largest value of y/x if x ˛ + y ˛ - 2x + 4y - 19 = 0.
1?
@sbharadwaj said:
approx 3.??
duno the oa.
i also thot approx 3 but i guess the max will be when 0

i mean when 0

@dreamz007 said:
@Dexian yup cn u show
A+B+C make 8 chairs in 10 days...........
so to make 80 chairs they together will need 10 days...
no A works and then B+C work.... a total of 20 days...
so A worked for 10 days and B+C worked for rest of 10 days ... which is effectively A+B+C working for 10 days making 80 chairs...

no concrete method as such... bas dikh gya luckily..
@techgeek2050 said:
duno the oa.i also thot approx 3 but i guess the max will be when 0
hmmm..lemme retry..! do tag me if u post the OA
@piyushrohella12 said:
1?
dont have the OA
y/x is approx 3 at x = 1.
@techgeek2050 said:
dont have the OAy/x is approx 3 at x = 1.
aise toh may b infinity bhi ban sakta hai the eqn is of circle
(x-1)^2 + (y+2)^2 =24
put x=0
(y+2)^2=23
-infinity
@techgeek2050 said:
Find the largest value of y/x if x ˛ + y ˛ - 2x + 4y - 19 = 0.
Range ?
@piyushrohella12 said:
aise toh may b infinity bhi ban sakta hai the eqn is of circle(x-1)^2 + (y+2)^2 =24put x=0(y+2)^2=23 -infinity
that's what i figured.. the closer we go to x=0, the larger the value will be.
@ScareCrow28 said:
Range ?
that's all that is given. this question was posted on fb by @bodhi_vriksha sir. i dont have the OA.
@techgeek2050 said:
that's all that is given. this question was posted on fb by @bodhi_vriksha sir. i dont have the OA.
And is that |y/x| or simply y/x ?? Ans will change in both cases
@piyushrohella12 said:
aise toh may b infinity bhi ban sakta hai the eqn is of circle(x-1)^2 + (y+2)^2 =24put x=0(y+2)^2=23 -infinity


in this circle centered at (1, -2) with radius= root(24)........... wat does y/x represent
is it the slope of the tangent...???
@ScareCrow28 said:
And is that |y/x| or simply y/x ?? Ans will change in both cases
simply y/x


@Dexian said:
in this circle centered at (1, -2) with radius= root(24)........... wat does y/x representis it the slope of the tangent...???
y cordinate / x cordinate