For melting one tonne of cast iron (A) 700 m3 air is required (B) 20 kg limestone is required (C) One quintal coke is required (D) All the above

For melting one tonne of cast iron
(A) 700 m3
 air is required
(B) 20 kg limestone is required
(C) One quintal coke is required
(D) All the above
by

1 Answer

Answer :

Answer: Option D
by

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