Answer Posted / lava kumar

Answer is very simple.
The ratio is Cats:Rats:Time
1:1:6
we have to maintain the same ratio
but the given ratio is
x:2:1
Therefore take the last two terms 2:1 has to be
made to 1:6
That is div by 2 and mul by 12 we get 12:12:72
therefore number of cats=12.

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