A) 60 years
B) 49 years
C) 30 years
D) 40 years
Correct Answer: B
Solution :
(b): Let ages be \[{{x}^{2}}\] and \[x:({{x}^{2}}-1)=8(x-1)\] \[\Rightarrow {{x}^{2}}-8x+7=0\Rightarrow (x-1)(x-7)=0\] \[\Rightarrow x=1,7\] \[x=7\] \[{{x}^{2}}=49\]You need to login to perform this action.
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