Question

Two number are in the ratio 2:7 . if 7 is add to both their ratio becomes 3:5 find the gretar nuber
a) 14
b)21
c)35
d)28​

Answer 1

Let the nos be x.
$\frac{2x + 7}{7x + 7} = \frac{3}{5} \\ = > 10x + 35 = 21x + 21 \\ = 35 - 21 = 21 x - 10 x$
Hence the number is fraction !
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