Question

20%(a+b) = 50% (a-b) then what is the
ratio between a and b​

Answer 1

Answer:

a:b=7:3

Step-by-step explanation:

20%(a+b)=50%(a-b) given

$\therefore (a+b)\frac{20}{100}=(a-b)\frac{50}{100}\\\\\implies \frac{(a+b)}{5}=\frac{(a-b)}{2}\\\\\implies 2\times(a+b)=5\times(a-b)\\\\\implies 2a+2b=5a-5b\\\\\implies 7b=3a\\\\\implies\frac{7}{3}=\frac{a}{b}\\\\\implies a:b=7:3$

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