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Question : 143 of 150
Marks:
+1,
-0
Solution:
Let
A,B,C,D are vertices of tetrahedron and
OA=(−),OB=−,OC=− and
OD=++. Then,
AB=−+2−,AC=−2++,AD=2+ ∴ Volume of tetrahedron
=[ABC] =|| =[−1(1−2)−2(−2−0)−1(−4−0)] [1+4+4] ==cubicunit
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