CGL 2012 Tier 2 Preparations and Results

Staff Selection Commission (SSC) SSC - CGL
381
@sh.arora10 said:
An ant starts from a point on the bottom edge of a right circular cylinder and moves in spiral manner along the curved surface area such that it reaches the top of cylinder at a point directly above the starting point in exactly 2 identical spirals. Find the distance covered by the ant if the radius of the cylinder is 6/pie and height is 20 units.
...........Ant will die eventually, aise question bhi aate hai kya
Need something to eat........see u all after lunch..haha dinner
382
@JS-M said:
...........Ant will die eventually , aise question bhi aate hai kya
Need something to eat........see u all after lunch..haha dinner
ha ha ha ha ha ha ha ha ha ha ah ah ha ha ha.......................... 10000000000
383
@sh.arora10 said:
An ant starts from a point on the bottom edge of a right circular cylinder and moves in spiral manner along the curved surface area such that it reaches the top of cylinder at a point directly above the starting point in exactly 2 identical spirals. Find the distance covered by the ant if the radius of the cylinder is 6/pie and height is 20 units.
is it 4rt61
384
@sh.arora10 said:
An ant starts from a point on the bottom edge of a right circular cylinder and moves in spiral manner along the curved surface area such that it reaches the top of cylinder at a point directly above the starting point in exactly 2 identical spirals. Find the distance covered by the ant if the radius of the cylinder is 6/pie and height is 20 units.
31.24units or 4*root61
385
@JS-M said:
share approach plz...answer z 100
gt 100 :)

let tube contain 100 gm of acid and 100 gm of water
1st test tube=acid(100-20)gm and water(100+20)
2nd test tube=acid(80+120*2/3) and water(120/3=40)gm

so 1st is 4 times the 2nd

386
@sh.arora10 said:
An ant starts from a point on the bottom edge of a right circular cylinder and moves in spiral manner along the curved surface area such that it reaches the top of cylinder at a point directly above the starting point in exactly 2 identical spirals. Find the distance covered by the ant if the radius of the cylinder is 6/pie and height is 20 units.
31.24
387
if a is a real non-zero real no. and b is positive real no.
2ba^4 + ba^3 + a^2 + ba + 2b = ka^2
least possible value of k?

1.2b+1
2.2b-1.
3.2-33b/4.
4.2+33b/4.
388
@JS-M said: On test tube contains some acid and another test tube contains an equal quantity of water.To prepare a solution, 20 grams of the acid is poured into the second test tube. Then, twothirdsof the so-formed solution is poured from the second tube into the first. If the fluid inthe first test tube is four times that in the second, what quantity of water was taken initially?
(A) 80 grams (B) 60 grams (C) 40 grams (D) 100 grams
100 grams
389

one type of liquid contains 25% of milk and other type contains 30% of milk. A can fill with 6 part of 1st liquid and 4 part of 2nd liquid. find the % of milk in new mixture.

options: 28%,25%,30%,27%
390
@sh.arora10 said: one type of liquid contains 25% of milk and other type contains 30% of milk. A can fill with 6 part of 1st liquid and 4 part of 2nd liquid. find the % of milk in new mixture.
options: 28%,25%,30%,27%
27 %

Share the sol'n for least value of k???????????????
391
@mickym said:
27 %
Share the sol'n for least value of k???????????????
2ba^4 + ba^3 + a^2 + ba + 2b = ka^2
2ba^4 + ba^3 + a^2(1-k) + ba + 2b = 0
a^4 + (a^3)/2 + a^2(1-k)/2b + a/2 = 0

For min value of k,

(1-k)/2b = -1
k-1 =2b
k=2b+1
392
@sh.arora10 said: one type of liquid contains 25% of milk and other type contains 30% of milk. A can fill with 6 part of 1st liquid and 4 part of 2nd liquid. find the % of milk in new mixture.
options: 28%,25%,30%,27%
is it 27% ??
393
@sh.arora10 said: (16^3)+(17^3)+(18^3)+(19^3) is divided by 35,than remainder will be..
zero
394
@sh.arora10 said:
2ba^4 + ba^3 + a^2 + ba + 2b = ka^2
2ba^4 + ba^3 + a^2(1-k) + ba + 2b = 0
a^4 + (a^3)/2 + a^2(1-k)/2b + a/2 = 0
For min value of k,
(1-k)/2b = -1
k-1 =2b
k=2b+1
why (1-k)/2b = -1 for min value
395
@sh.arora10 said: A positive integer is written on each face of a cube. Each vertex is then assigned a product of the numbers written on the three faces intersecting the vertex. The sum of the numbers assigned to all the vertices is equal to 1001. Find the sum of the numbers written on the faces of the cube.
someone solve this
396
@007pagal said:
someone solve this
ans is 31 bro

1001 = 11*13*7

now let the nos on each face be
a b c d e f
so (a+b)(c+d)(e+f)= 1001
so sum of nos= 11+13+7= 31
397
@sh.arora10 said: one type of liquid contains 25% of milk and other type contains 30% of milk. A can fill with 6 part of 1st liquid and 4 part of 2nd liquid. find the % of milk in new mixture.
options: 28%,25%,30%,27%
27 ??
398
@mickym said:
why (1-k)/2b = -1 for min value
yaar i m nt so sure whether my method is correct or not...
but answr is 2b+1

399
@sh.arora10 said:
yaar i m nt so sure whether my method is correct or not...
but answr is 2b+1
yaar i wanna knw the logic..
why the sum of roots taken two at a tym equated to -1 ??

400
@JS-M said:
Share your approach plz........
@JS-M said:
Share your approach plz........
bhai initially cube has 6 faces. when it is cut the number of faces increased to 8 and were divided into 2 so each cube has 4 faces and 1 is not painted in each so 25% is the correct answer.