If 2.8, 7, 12 and x are in proportion then x = ………………..
If 2.8, 7, 12 and x are in proportion then x = ………………..
A) 20
B) 31
C) 30
D) 40
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If 2.8, 7, 12 and x are in proportion then x = ………………..
A) 20
B) 31
C) 30
D) 40