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Physics Chemistry

Entry Test MCQ :: Age Questions


  Cs mother was four times as old as C ten years ago. After 10 years she will be twice as old as C is now. How old C is now?
[A]. 15[B]. 30
[C]. 20[D]. 25

Answer: Option C


Yasir Ali said:    
 
The correct answer of this question is 10. let the present age of mother= M ....................... C....= C by first condition M+10=4(C-10) M-4C=-30.........eq(1) Now the issue is in second condition...Here the mother age is compared with the present age of C, not the future age...so equation will be some how like M+10=2C.....and not M+10=2(C+10) so the second equation is M-2C=-10.....eq(2) solving simultaneously we get C=10....

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