allerya : b = 3 : 4 மற்றும் b : c = 5 : 7 எனில், a : c என்பது
A3 : 7
B15 : 28
C12 : 35
D21 : 20
Answer & Solution
Correct answer: B. 15 : 28
**பொது b:** a : b = 15 : 20 (5 ஆல் பெருக்கவும்)
b : c = 20 : 28 (4 ஆல் பெருக்கவும்).
**எனவே ஒரு :** c = 15 : 28.
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