Pranjali P. answered 04/16/15
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NTA Certified Tutor , AP Computer Science, Math,Algebra
lcm(18a2b4 and 27a3b)
multipliers of 18 and 27
18 : 18,36,54....
27 :27,54....
so lcm of 18 and 27 is 54.......1
lcm of a2b4 and a3b is a3b4 ........2
as
a2b4= axa x bxbxbxb
a3b= axaxa x b
from 1 and 2 the final answer is 54a3b4.