If a : b = 2 : 5, b : c = 4 : 7 and c : d = 9 : 14, then what is a : b – McqOptions

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1.	If a : b = 2 : 5, b : c = 4 : 7 and c : d = 9 : 14, then what is a : b : c : d?
A.	36 : 180 : 215 : 490
B.	72 : 180 : 315 : 490
C.	72 : 180 : 245 : 490
D.	72 : 144 : 315 : 490
Answer» C. 72 : 180 : 245 : 490

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