Hi 

 B/C = 6/5

5B = 6C

C = (5/6)B



Let x represent the constant of proportionality



6x + 4x + (10/3)x = 160kg

18x + 12x + 10x = 480

40x = 480

x = 12kg 

A: 72kg 

B: 48kg 

C: 40kg 

AND

sum = 160kg CHECKS!

 

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