A) 36 yr, 9 yr
B) 39 yr, 6 yr
C) 42 yr, 12 yr
D) 25 yr, 10 yr
Correct Answer: A
Solution :
Present ages of mother and son\[=x\] years and \[(45-x)\]years Then, \[(x-5)(45-x-45)=4\,\,(x-5)\] or \[-{{x}^{2}}+41x-180=0\] or \[x=36\] \[\therefore \]The present ages of mother and son are 36 yr and 9 yr respectively.You need to login to perform this action.
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