Official Quant thread for CAT 2013

MBA CAT 2022
521
@CBZ123 said:
@rkshtsurana but your OA is right. accd to official key.. and none of the options matches with the 2.5 times' ans
mene abhi 2.5 times se 4 hrs nikala he..
and 1.5 times se 3 hs 20 min..
OA kya he...confusion hgya mhe bhi ab yr .
@bullseyes check plz
522
@CBZ123 bhai 1.5 times hi hna chahye..mene kch purane TW k ques dekhe..sabme yehi language he...
523
@rkshtsurana said:
A trapezoid is divided into four triangles by its diagonals. Let the triangles adjacent to the parallel sides have areas x and y( i.e. opposite traingles). Find the area of the trapezoid in terms of x and y
(root(x) + root(y))^2 ??

btw what to check?? is answer wrong?
524
@rkshtsurana ok! aur kuch pta lage to tag karna..thnx
525
@bullseyes said:
(root(x) + root(y))^2 ??btw what to check?? is answer wrong?
na CBZ ne jo time wrk ka ques daala he usme 2nd pipe ki capacity pe doubt aa rha he
526
@CBZ123 said:
Pavan builds an overhead tank in his house, whichhas three taps attached to it. While the first tapcan fill the tank in 12 hours, the second one takesone and a half times more than the first one to fill itcompletely. A third tap is attached to the tank whichempties it in 36 hours. Now, one day, in order to fillthe tank, Pavan opens the first tap and after twohours opens the second tap as well. However; atthe end of the sixth hour, he realizes that the thirdtap has been kept open right from the beginningand promptly closes it. What will be the total timerequired to fill the tank
3.2hrs
527
@rkshtsurana said:
share approach
http://www.qbyte.org/puzzles/p132s.html

528
@rkshtsurana
dnt be modest ahhhhh apna naam bhi daal de
iska matlab main nahi samjha.
529
@IIM-A2013 said:
@rkshtsuranadnt be modest ahhhhh apna naam bhi daal deiska matlab main nahi samjha.
vo me tumhe nhi keh rha tha ..vo gs4890 ko keh rha tha
530
@rkshtsurana said:
In ABC, draw AD, where D is the midpoint of BC. If ACB = 30째 and ADB = 45째, find ABC.
531
@rkshtsurana said:
A trapezoid is divided into four triangles by its diagonals. Let the triangles adjacent to the parallel sides have areas x and y( i.e. opposite traingles). Find the area of the trapezoid in terms of x and y
[rt(x)+rt(y)]*1/2*h

but here h is creating problem..
532
@rkshtsurana
ok koi bt nahi.............
533
@viewpt nopes bhai..
its simply
let area of other two traingle be a each then
a^2 = xy
a = rt (xy)
so area of trapezoid = x + y + 2rt(xy) = ( rt(x) + rt(y) )^2
534
Let N be a number in base 16,but contains only 3 zeros and 3 ones.
Find the maximum number of zeros,when the number is denoted in base 2.
535
@rkshtsurana said:
@viewpt nopes bhai..its simply let area of other two traingle be a each thena^2 = xya = rt (xy)so area of trapezoid = x + y + 2rt(xy) = ( rt(x) + rt(y) )^2
plz explain how a each??
536
@rkshtsurana said:
na CBZ ne jo time wrk ka ques daala he usme 2nd pipe ki capacity pe doubt aa rha he
it shld be 2.5 times only.. consider if A is 10 and B is 25 then B is 15 more then A which is 1.5 times "more" then A
537
@viewpt said:
plz explain how a each??
@viewpt said:
plz explain how a each??
isko mene ncert me pada tha..
opposite triangle k areas multiply hnge toh product equal hga..for detailed solution
http://www.qbyte.org/puzzles/p055s.html
538
@bullseyes said:
it shld be 2.5 times only.. consider if A is 10 and B is 25 then B is 15 more then A which is 1.5 times "more" then A
but OA 1.5 k acc diya he
539
@rkshtsurana said:
Let N be a number in base 16,but contains only 3 zeros and 3 ones.Find the maximum number of zeros,when the number is denoted in base 2.
18?
540
@rkshtsurana said:
but OA 1.5 k acc diya he
as u said earlier.. more is the key.. it shld have been "the second tank fills in one and half times the first one"..

usually i dnt trust books much these days.. prolly trust internet more 😃