A) 15
B) 12
C) 10
D) 8
Correct Answer: C
Solution :
Present age of daughter= 20 yr, then Mr. ?X? present age \[=20\times 2=40\,\,yr\] According to questions, \[3(20-x)=40-x\] \[\Rightarrow \] \[60-3x=40-x\] \[\Rightarrow \] \[2x=20\Rightarrow \,\,\,\,\,x=10\,\,yr\]You need to login to perform this action.
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