Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - General Questions (Q.No. 4)
4.
A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, then how old is B?
Answer: Option
Explanation:
Let C's age be x years. Then, B's age = 2x years. A's age = (2x + 2) years.
(2x + 2) + 2x + x = 27
5x = 25
x = 5.
Hence, B's age = 2x = 10 years.
Discussion:
79 comments Page 8 of 8.
Hayat said:
10 years ago
Let B=x.
Then according to 1st condition.
A=2+B (B=x).
So A=2+x.
2nd condition B=2C so C=B/2 (B=x).
C=x/2.
Add A, B and C.
A+B+C=27.
(2+x) + (2 (x/2) ) + (x/2) =27.
Simplify the equation.
5x+4=50.
X=10 (option D ans).
Then according to 1st condition.
A=2+B (B=x).
So A=2+x.
2nd condition B=2C so C=B/2 (B=x).
C=x/2.
Add A, B and C.
A+B+C=27.
(2+x) + (2 (x/2) ) + (x/2) =27.
Simplify the equation.
5x+4=50.
X=10 (option D ans).
Xyz abc said:
9 years ago
B = x, A = x+2, C = 1/2x.
Right?
Right?
Suraj said:
9 years ago
If b = x,
then,
a = 2 + x
c = 2 + 2 + x = 4 + x.
Then,
a + b + c = 27.
(2 + x) + x + (4 + x) = 27.
3x = 27 + 2 + 4.
x = 33/3.
x = 10.
then,
a = 2 + x
c = 2 + 2 + x = 4 + x.
Then,
a + b + c = 27.
(2 + x) + x + (4 + x) = 27.
3x = 27 + 2 + 4.
x = 33/3.
x = 10.
Shriram Nagorao Deshmukh said:
9 years ago
A = 2 + B.
B = 2C -> Eq 1.
A + B + C = 27 -> Eq 2.
Put value of A and B in 2,
2 + 2C + 2C + C = 27,
2C + 2C + C = 27 - 2,
2C + 2C + C= 25,
5C = 25,
C = 5,
Put C in eq 1,
B = 2 * 5,
B = 10.
B = 2C -> Eq 1.
A + B + C = 27 -> Eq 2.
Put value of A and B in 2,
2 + 2C + 2C + C = 27,
2C + 2C + C = 27 - 2,
2C + 2C + C= 25,
5C = 25,
C = 5,
Put C in eq 1,
B = 2 * 5,
B = 10.
Sonam said:
9 years ago
Solve this. The three sibling in a family is Anu, Rita, Bunu. Rita age is four years older than Anu and Bunu is Two years older than Rita. The sum of their ages is 40. Bunu age is?
Saro said:
9 years ago
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.
B = 2C,
A + B + C = 27.
So, (2 + B) + B + B/2 = 27,
2B + B/2 = 25,
5B/2 = 25,
B = 10.
Dhinu said:
9 years ago
Remember as "is" implies "=".
Sagar said:
9 years ago
According to me, the answer is 9.
Sairam.b said:
9 years ago
Thank you @Kalai.
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