Find out the volume of a prism on tringular base, the three sides of the prism meeting on a vertex are given below: →OA=3i+4j+12k,→OB=12i+3j+4k,→OC=4i+12j+3k.
A
472.5
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B
693.5
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C
945
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D
1387
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Solution
The correct option is B 693.5 Required volume=12∣∣
∣∣341212344123∣∣
∣∣=12[3(9−48)−4(36−16)+12(144−12)]=13872=693.5.