CGL 2012 Tier 2 Preparations and Results

Staff Selection Commission (SSC) SSC - CGL
2195

on selling a pen at 5%loss and a book at 15% gain. karim gains rs 7 . if he sells the pen at 5 % gain and the book at 10% gain then he gains rs 13..find the actual price..

2196

kindly, help her at once. passive

2197
@JS-M bhai i used differentiation..usse pta chal gya ki denominator ka maxima minima x= -1 par hai..bt if we put x=0 in (x+2)/2x^2+4x+8 ki value is more than putting x=-1


Aisa isliye ho raha hai kyu ki the quadratic has no real roots
2198
@cbiofficer said: on selling a pen at 5%loss and a book at 15% gain. karim gains rs 7 . if he sells then he gains rs 13..find the actual price..
if he sells ??? plz re write d q :)
2199
@sampras said: Fun :

.Anna, the older twin, was born three hours before her younger sister Lana. On Lana's 21st birthday, they both went out to a club with some friends. The bouncer was checking ID's and let Lana go in. But when the older Anna tried to follow her in, the bouncer said, "I'm sorry, your 21st birthday isn't for another two days." How is this possible?

I guess all this is happening around 28th feb......plzz check the question once....i am not able to get it even after giving it much time
2200
@cbiofficer said: on selling a pen at 5%loss and a book at 15% gain. karim gains rs 7 . if he sells the pen at 5 % gain and the book at 10% gain then he gains rs 13..find the actual price..
book =60
pen=180
2201

a sphere is inscribed in a cubical box such that sphere is tangent to all six faces of the box. what is d ratio of the volume of cubical box to the volume of sphere..?

2202
@Brooklyn said:
book =60
pen=180
2203
@JS-M said:
yr maine sirf tanA.tanB = 3 .......ko consider kiya.........when A=B =30 so C must be 120
my take........
tan A tan B=3 then angle A=60=B,,,, n C also 60 ....not 120 bhai
2204
@Brooklyn said:
@JS-M : uska max walle ka ans is 1/4
baki aap apna logic bhi to btao
= x-2/{2x(x-2) +8x+8}
now reverse it and separate division
= 2x + 8(x-1/x-2)
thz z to be minimum for (1/thz) to be max......
2205
@sandeepv882 said:
tan A tan B=3 then angle A=60=B,,,, n C also 60 ....not 120 bhai
ohh.......my bad.... then it equilateral triangle
2206
@cbiofficer said: on selling a pen at 5%loss and a book at 15% gain. karim gains rs 7 . if he sells the pen at 5 % gain and the book at 10% gain then he gains rs 13..find the actual price..
Book = 80
Pen 100
2207
@JS-M said:
ohh.......my bad.... then it equilateral triangle
but bhai ye tan A + tan B+ tan C=6 ko satisfy nhi karta
2208
@mickym said:
Book = 80
Pen 100
correct
aa gye bhai mathematician..
2209
@cbiofficer 6:22/7...
2210
@cbiofficer said: a sphere is inscribed in a cubical box such that sphere is tangent to all six faces of the box. what is d ratio of the volume of cubical box to the volume of sphere..?
6/pi
2211
@sumit1234567890 said:
@cbiofficer 6:22/7...
2212
@mickym said:
6/pi
2213
@cbiofficer said: a sphere is inscribed in a cubical box such that sphere is tangent to all six faces of the box. what is d ratio of the volume of cubical box to the volume of sphere..?
@cbiofficer 6 : pi ??
2214
@mrudalmodi said:
In a tri ABC tan A + tanB + tanC = 6 and
tan A.tanB = 3 then triangle is-
(A) Acute angled (B) Obtuse angled
(C) Right angled (D) Equilateral
plz explain
Acute ANGLED

Tan C will be = 2
Tan A tan B= 3
=> all angles ACUTE