Verbal Reasoning - Arithmetic Reasoning - Discussion

Discussion :: Arithmetic Reasoning - Section 1 (Q.No.14)

14. 

12 year old Manick is three times as old as his brother Rahul. How old will Manick be when he is twice as old as Rahul ?

[A]. 14 years
[B]. 16 years
[C]. 18 years
[D]. 20 years

Answer: Option B

Explanation:

Manick's present age = 12 years, Rahul's present age = 4 years.

Let Manick be twice as old as Rahul after x years from now.

Then, 12 + x = 2 (4 + x) 12 + x = 8 + 2x x = 4.

Hence, Manick's required age = 12 + x = 16 years.


Tns said: (Jul 10, 2012)  
B. 16 years.

12 year old Manick is three times as old as his brother Rahul who must be 4 years old.

Diff in ages = 8 years.

When Rahul will become 8 years old, manick will be 16 years old and he will be twice as old as Rahul.

Kindorji said: (May 18, 2019)  
How comes Rahul's present age 4 when its says Manick is 3 times greater than Rahul?

Usha said: (Sep 27, 2019)  
Manick age that is 12=3 * Rahul age.
12=3 * 4.

Rahul age becomes 4 then only it equals to Manick age =12.

Raveena Chavan said: (Nov 22, 2019)  
3/12 = 2/x.
3x = 24 ; cross multiplication.
x = 24/3.
x = 8.

As twice mentioned,we have to multiply by 2.
X = 8x2.
X = 16 answer.

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