A) 8, 12, 16
B) 8, 14, 20
C) 10, 16, 22
D) None of these
Correct Answer: B
Solution :
\[(a-d)+a+(a+d)=42\Rightarrow a=14\] \[\Rightarrow \]\[(a-d)\times a\times (a+d)=(14-d)\times 14\times (14+d)=2240\] \[\Rightarrow \] \[({{14}^{2}}-{{d}^{2}})=160\] \[\Rightarrow \] \[{{d}^{2}}=196-160=36\] \[\therefore \] \[d=\pm \,6\]You need to login to perform this action.
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