| 20. यदि a : b : c = 3 : 4 : 7 हो,...
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| 20. यदि a : b : c = 3 : 4 : 7 हो, तो अनुपात | (a + b + c): c बराबर होगा (1) 2: 1 (2) 14 : 3 (3) 7:2 (4) 1 : 2

11th - 12th Class
Maths
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20. (1) ( frac{a}{3}=frac{b}{4}=frac{c}{7}=k ) ( Rightarrow a=3 k, b=4 k ) एवं ( c=7 k ) ( Rightarrow frac{a+b+c}{c}=frac{3 k+4 k+7 k}{7 k} ) ( =frac{14 k}{7 k}=2=2: 1 )
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