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एक समांतर षट्फलक जिसकी कोरें सदिशों -12h...

एक समांतर षट्फलक जिसकी कोरें सदिशों `-12hati+lambda hatk, 3hatj-hatk, 2hati+hatj-15hatk` से निरूपित हैं, का आयतन 546 घन इकाई है। `lambda` का मान ज्ञात कीजिए ।

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