A) 65
B) 68
C) 70
D) 60
Correct Answer: D
Solution :
[d] Let present age of father=x Present age of son=y According to question, \[x+y=90\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,...(i)\] ? (i) Now, \[\frac{x-\,10}{y-\,10}=\frac{5}{2}\] \[2x-\,20=5y-\,50\] \[2x-\,5y=-\,30\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,...(ii)\] ? (ii) From eq. (i) and (ii) x=60 y=30 \[\therefore \]The present age of mother = 60 years.You need to login to perform this action.
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