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Ajay Bablu Chirag
21 28 15
420 LCM of 21,28,15
20 15 28
Ajay And Chirag both working 5 days = (20+28) ×5=240
Remaining work complete by Ajay Bablu and Chirag =180/63
=20/7=2(6/7) days
Which of the following statements is/are true?
Statement A: Mica and biotite are the secondary minerals but also act as primary minerals.
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