CGL 2012 Tier 2 Preparations and Results

Staff Selection Commission (SSC) SSC - CGL
341
@JS-M said: A cube of white chalk is painted red, and then cut parallel to the sides to form two rectangular solids of equal volume. What percent of the surface area of each of the new solids is not painted red?(A) 20% (B) 162/3 % (C) 15% (D) 25%
i am getting the answer as 25 %.. hav a gut feeling this is wrong
342
@JS-M said:
yr easy way ..........16/2{50+ (16-1)*5} = 1000
now v need >1000, then it will be (1105)
answer me error ni hai.....
In 1st yr he had 25rs,he save rs.5 more than last yr
therefor the series will be 25,30,35,...
Sn=n/2*(2a+(n-1)d)
1000=n/2*((2*25)+(n-1)5)
therefore n=16
so after 16 yrs his savings will be above rs.1000
such that Sn=(17/2)*(50+(16*5))=1105
343
@watsnew24 said:
yaar 5 + 10 +15 +20...... kar k bhi dekha nhi aa rahacalci pe check kroactual me to karna yahi hai
In 1st yr he had 25rs,he save rs.5 more than last yr
therefor the series will be 25,30,35,...
Sn=n/2*(2a+(n-1)d)
1000=n/2*((2*25)+(n-1)5)
therefore n=16
so after 16 yrs his savings will be above rs.1000
such that Sn=(17/2)*(50+(16*5))=1105
344
@JS-M said: A cube of white chalk is painted red, and then cut parallel to the sides to form two rectangular solids of equal volume. What percent of the surface area of each of the new solids is not painted red?(A) 20% (B) 162/3 % (C) 15% (D) 25%
(D)25%
345
@JS-M said: A cube of white chalk is painted red, and then cut parallel to the sides to form two rectangular solids of equal volume. What percent of the surface area of each of the new solids is not painted red?(A) 20% (B) 162/3 % (C) 15% (D) 25%
25%????
346
@007pagal said:
yr hum kon sa shakespeare hai............just for d sake of CGL, ANGREZI dekh lete hai.....don't mind plz...
347
@sh.arora10 said:
In 1st yr he had 25rs,he save rs.5 more than last yr
therefor the series will be 25,30,35,...
Sn=n/2*(2a+(n-1)d)
1000=n/2*((2*25)+(n-1)5)
therefore n=16
so after 16 yrs his savings will be above rs.1000
such that Sn=(17/2)*(50+(16*5))=1105
in 16 y he will save 1000 1105 will be if it is in how many yr his saving will be more than 1000 rs (17y)
348
If x ml pure alcohol is added to 400 ml of a 15% solution and after adding its strength becomes 32%, then the value of x is
(A) 50 ml (B) 75 ml
(C) 200 ml (D) 100 ml
349
@rahulshaitan said:
25%????
@007pagal said:
(D)25%
@Vineeth555 said:
i am getting the answer as 25 %.. hav a gut feeling this is wrong
Share your approach plz........
350
@JS-M said:
yr hum kon sa shakespeare hai............just for d sake of CGL, ANGREZI dekh lete hai.....don't mind plz...
bro cube waale ka explain kr do
351
@sh.arora10 said:
If x ml pure alcohol is added to 400 ml of a 15% solution and after adding its strength becomes 32%, then the value of x is
(A) 50 ml (B) 75 ml
(C) 200 ml (D) 100 ml
100 ml
352
@sh.arora10 said:
If x ml pure alcohol is added to 400 ml of a 15% solution and after adding its strength becomes 32%, then the value of x is
(A) 50 ml (B) 75 ml
(C) 200 ml (D) 100 ml
100 ml..
353
@sh.arora10 said:
If x ml pure alcohol is added to 400 ml of a 15% solution and after adding its strength becomes 32%, then the value of x is
(A) 50 ml (B) 75 ml
(C) 200 ml (D) 100 ml
100ml
354
@cbiofficer said:
100ml
yr ek trigo wale ka answer diya than batana sahi hai kya??
355
@visitsameer : yup got 100 ml ...y did u post ans??
btw method:

15% of 400=60

60+x/400+x = 32/100 solve for x nw
356
@JS-M said:
Share your approach plz........
assuming that my answer is correct

take cube of side 10.. initially the surface area is 600.. on cutting it parallel to length (or breadth or width ), we get two small cuboids..here top and bottom surfaces of the cuboid will be unchanged.. but the lateral sides gets sliced in half.. so the overall lateral area will be = 10X10/2, taken 4 times.. which is 50 X 4= 200.. overall area = 200 + 100+100 ( top and bottom)..only bottom face remains not painted.. that is 100.. so 25 %
357
@visitsameer said:
If x ml pure alcohol is added to 400 ml of a 15% solution and after adding its strength becomes 32%, then the value of x is
(A) 50 ml (B) 75 ml
(C) 200 ml (D) 100 mlthe answer is 100 ml
15% of 400 = 60 left 320ml

320ml is 64%(100-32) of of 500 hence added 400+100 = 500
358

(16^3)+(17^3)+(18^3)+(19^3) is divided by 35,than remainder will be..

359
@JS-M said:
yr ek trigo wale ka answer diya than batana sahi hai kya??
wrng
360
@sh.arora10 said: (16^3)+(17^3)+(18^3)+(19^3) is divided by 35,than remainder will be..


options...????