Hard
If 2A=4B=5C, then A:B:C is
Explanation
Explanation
Let 2A=4B=5C=k (LCM based approach). Then A=k/2, B=k/4, C=k/5. Taking LCM of 2,4,5 = 20: A:B:C = 10:5:4.
PRO TIP
Re-check your working by substituting the answer back into the original question.