Question

If A:B = 5:12 and B:C = 21:11, find A:B:C.​

Answer 1

Answer:

a/b = 5/12 …. (i)

b/c = 11/4 ….. (ii)

Multiplying numerator and denominator of eq (i) by 11

and multiplying numerator and denominator of eq (ii) by 12

a/b = 55/132 ….. (iii)

b/c = 132/48 …… (iv)

Comparing eq (iii) and eq (iv)

a:b:c = 55:132:48

Answer 2

Answer:

A : B=5 : 12=5*7 : 12*7=35 : 84

B : C=21 : 11=21*4 : 11*4=84 : 44

so,

A : B : C= 35 : 84 : 44