alleryاگر a : b = 3 : 4 اور b : c = 5 : 7، تو a : c ہے
A3 : 7
B15 : 28
C12 : 35
D21 : 20
Answer & Solution
Correct answer: B. 15 : 28
**Common b:** a : b = 15 : 20 (5 سے ضرب)
b : c = 20 : 28 (4 سے ضرب)۔
**تو ایک :** c = 15 : 28۔
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