Question

plz answer this question step by step

Answer 1

A : B = 4 : 5
B : C = 3 : 4
L.C.M. of 5 and 3 = 15
We will multiply 3 in A : B and 5 in B : C
3×(A :B) and 5×( B : C)
=> A : B : C = 12 : 15 : 20
=> C is the tallest among the three.

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