Official Quant thread for CAT 2013

MBA CAT 2024
19886
@jashholmes said:
On a certain assembly-line, the rejection rate for Tuesday's production was 10%, for Thursday 25% and for two days combined was 20%. What was the ratio of Thursday's production to Tuesday's production???
.9x + .75y = .8(x + y)
.1x = .05y
y/x = .1/.05 = 10/5 = 2/1 ?
19887
@Estallar12 said:
Rate of slowing down = 3x/10 in 15 seconds = 3x/150 = x/50 m/sec.So, in 25 seconds, speed will be x - x/2 = 45So, x = 90 m/sec.
Hw did u suddenly got 3x....it is mention 7/10th???
19888
@jashholmes said:
Hw did u suddenly got 3x....it is mention 7/10th???
Reduced to 7/10 th => There was a loss of 3/10 th of original speed.
19889
@blowcat13 said:
I have a box .the top has an area 240 square inches the side 300 sqinch and the end 180sqinch.What is the depth of the box?
15 ?
l*b = 240
b*h = 300
l*h = 180

180/h*300/h = 240
h^2 = 225
h = 15
19890
@Estallar12 said:
Reduced to 7/10 th => There was a loss of 3/10 th of original speed.
k...bt can u solve it suing percentages???
19891
@falcao according to me the answer is two times.
19892
@blowcat13 said:
I have a box .the top has an area 240 square inches the side 300 sqinch and the end 180sqinch.What is the depth of the box?
240 = L B = 12 * 20
For 180, Height = 15 and 15 will give 15*20 = 300 too.

So, Depth = 15m.
19893
@blowcat13 said:
I have a box .the top has an area 240 square inches the side 300 sqinch and the end 180sqinch.What is the depth of the box?
depth is 15?
breadth is 20 and length is 12.
19894
@mailtoankit
@ChirpiBird yahh..15
19895

@scrabbler said:
OA could also be wrong. It has been known to happen?regardsscrabbler
@jaswik said:
@sbharadwaj oa:5:3
Bhi 5:3 sahi he
Let Present age of father F,
Present age of son S
Past age of son S1
now according to question when father was S he was actually 3S1
so,

S=3S1..S1=S/3
But age difference always remains the same so
S-S/3=F-S solving F/S=5:3
19896
@falcao said:
A and B run a 5 km race on a round course of 400 m. If their speeds are in the ratio 5 : 4, then how many times will the winner of the race pass the other participant?a 5 timesb 3 times c 4 timesd 2 times@Estallar12@jain4444
@Subhashdec2 - Ratio = 5 : 4.
Let speeds = 50 and 40.
So, Diff = 10.
Time = 400/10 = 40 secs.
Thus, 50*40 = 2000 m.
So, next meeting at 4000 m.

Thus, 2 meetings.

What am I missing here Bro ? :splat:
19897
@Estallar12 -nothing sir.ur explanation is absolutely perfect.even i got 2.i was just confirming with u,because one of the guys in an fb group was saying 3
19898
@jashholmes said:
On a certain assembly-line, the rejection rate for Tuesday's production was 10%, for Thursday 25% and for two days combined was 20%. What was the ratio of Thursday's production to Tuesday's production???
10 % A + 25 % B = 20% ( A + B )

=> 0.1 A + 0.25 B = 0.2 A + 0.2 B

=> 0.05 B = 0.1 A

=> A / B = 0.05 / 0.1 = 1 : 2

Thus, B : A = 2 :1

P.S. Using percentages Eh ? :splat:
19899
A rich aristocrat decided that he would give every man rs.45 and every women Rs.60.Only one ninth of the man and only one twelfth of the women collected their dues .how much money had aristocrat spent if there were 3552 people in total
a)17760 b)18540 c)16320 d)14640
19900
@falcao said:
@Estallar12 -nothing sir.ur explanation is absolutely perfect.even i got 2.i was just confirming with u,because one of the guys in an fb group was saying 3
Yeah I know! :D

Woh main @Subhashdec2 Bhai se puch raha hu. He was saying something else.!! :)
19901
@blowcat13 said:
A rich aristocrat decided that he would give every man rs.45 and every women Rs.60.Only one ninth of the man and only one twelfth of the women collected their dues .how much money had aristocrat spent if there were 3552 people in total a)17760 b)18540 c)16320 d)14640
is it a??.. 17760.

19902
@ChirpiBird dont know what the oa is..how did u solve???
19903
@Estallar12 said:
Haha!Nahin. Thoda headache and sleepy may be! Anyways, Spam nahin karte hain.Question. -A certain calculator has a faulty display which can display only the digits 1,2,3 and 4. Find the sum of all the four digit numbers with distinct digits that the calculator can display? a) 66660b) 44440c) 22000d) 33330e) none of these.
_ _ _ 4 = 6 number

6*(1 + 2 + 3 + 4) = 6 0(unit digit)
6*(1 + 2 + 3 + 4) + 6 = 6 6(tens digit)

and so on

so , number will be = 66660

@Estallar12 bhai natmastak pranam \\____O//
19904

M= total men
W = total women

3552= M+W
let X be total amount he had0( which he was able to pay only some men and some women.)

X= (M/9)*45+(W/12)*60
X=5M+ 5W
x=5(M+W)
x=3552*5=17760
@blowcat13 said:
@ChirpiBird dont know what the oa is..how did u solve???
19905
@blowcat13 said:
A rich aristocrat decided that he would give every man rs.45 and every women Rs.60.Only one ninth of the man and only one twelfth of the women collected their dues .how much money had aristocrat spent if there were 3552 people in total a)17760 b)18540 c)16320 d)14640
17760?

x + y = 3552
45x/9 + 60y/12 = 5x + 5y = 5(x + y) = 5*3552 = 17760