which is an alternate method to solve the same problem.....
Suresh said:
(Wed, Jun 16, 2010 05:00:30 AM)
Mr Dharumaraj shall you please explain ur answer?
Shan said:
(Sat, Aug 21, 2010 01:37:45 AM)
Hi,
let c year is x
then B is twice of C then, B=2x
Then A is 2 years older then B, therefore now B=2x,Then A=2+B, that is A=2+2x
Therefore sum up all the value:[(2+2x)for A,2x for B,x for C]
therefore 2+2x+2x+x=27
5x+2=27
5x=27-2
5x=25
x=25/5
x=5
now B is directly linked with C rather then A
Therefore B=2x
where x=5
2*5=10 that'z it my frnd
Sri said:
(Sat, Oct 2, 2010 12:36:02 PM)
B is twice as old as C means C=2B right?
Raheem said:
(Tue, Nov 16, 2010 11:56:03 AM)
Who is twice as old as c means?
Sweta said:
(Wed, Dec 22, 2010 06:27:52 AM)
We can also solve as
A's age be x yrs. then B's age is x-2 and C's age is(x-2)/2.
Prashanth said:
(Wed, Jan 19, 2011 03:50:40 AM)
Your thought is right but answer will be wrong..just watch
A+B+C=27
x+x-2+(x-2)/2 = 27
2x+2x-4+x-2 = 27*2= 54
5x-6 = 54
5x= 48
Finally x=48/5
which is a wrong ans
always we have to equal the x to the smallest number as per the problem....
Shalini said:
(Tue, Feb 22, 2011 12:28:10 PM)
I got ur explantion but in solving y cannt we take
2(2x)+2x+x=27 bcoz when i read this question i did in this way only but when after
I saw this answer it was different.
SO PLZ TELL ME SOME TIPS HOW 2 IDENTIFY THIS IS BELONGS 2 THIS METHODS
Ganesh said:
(Fri, Mar 4, 2011 04:16:49 PM)
A=2+B,
B=2C
A+B+C=27
so (2+B) + B + B/2 = 27
2B + B/2 = 25
5B/2 = 25
B=10
Ilaks said:
(Tue, May 17, 2011 09:48:07 AM)
@shalini
Read the ques properly.
Assume C=X. it is given that A IS 2 YEARS OLDER THAN B. It means that we should ADD the 2 years to B's age, so A=B+2.
Then for C it is given that it was TWICE AS OLD AS C. so it is understood tat it should be MULTIPLIED WITH THE C'S AGE. so B=2X.
Finally, sub B=2X in A's equation(A=B+2). therefore A=2X+2
Now A+B+C=27, therefore sub the values of A,B,C in the equation
2X+2+2X+X=27
5X+2=27
5X=27-2
5X=25
X=5.
Vignesh Venkatesan said:
(Wed, May 18, 2011 07:36:11 AM)
The population of town was 24000. If males increases by 6% and females by9%, it becomes 25620. Number of males and females are?- Please any one explain me...
Naresh said:
(Mon, Mar 5, 2012 04:52:29 PM)
Hi dude............
females(Y)=6000,males(X)=18000
x+y=24000........................(1)
(106/100)x+(109/100)y=25620.......(2)
by solving this 2 u get before increasing values..........
after increasing total number of females are (109/100)*6000=6540
after increasing total number of males are (106/100)*18000=19080
total is 25620
Hence proved(any doubts?)
Renu said:
(Tue, Apr 10, 2012 12:32:53 AM)
A+B+C=27
(B+2)+B+(B-2)=27
3B=27
B=9
Geetha said:
(Mon, Apr 30, 2012 08:24:08 PM)
How u get x=18000 and y=6000?
How it come?
106/100
109/100
Kalai said:
(Mon, May 7, 2012 04:32:19 PM)
A is 2 years old than B ===> A= B+2
B is Twice as old than c ===> B=2C ==> C=B/2
A+B+C = 27
So we can write as below
A+B+C = 27
B+2+B+B/2 = 27
B+B+B/2=27-2
2B+B/2=25
(4B+B)/2=25
5B=50
B=10
Put (3),(2) in (1)
=>(B+2)+B+(B/2)=27;
=> 2B+4+2B+B=54;
=> 5B=50-4;
=> B=10;
Hope it'll help you
Shajil George said:
(Wed, Sep 12, 2012 11:34:36 AM)
Let the age of c is x
Given that the age of b is twice of c age so,
b is age is 2x
Similarly
a is two years grater than b is age, so,
a is 2x+x
From the Question
The sum of a,b,c is 27
Then,
2x+2+2x+x=27
5x+2=27
5x=27-2
5x=25
x=25/5
=5
So,the age of b is 2x,
The value of x is 5
So the age of bis 10.
Neeta said:
(Sun, Oct 14, 2012 09:41:11 PM)
Why can't we take B=x? if answer is same when we assume any one out of A B C =x, answer will be wrong if we assume B=x
(2x + 2) + 2x + x = 27
5x = 25