Thank u so much sir ji

if all r 2 legged then no of animals is 90 and no of legs =180 but it should b224.if one two legedd is exchanged by a 4 legged then no legs increases by2.then 44/2=22 two legged be xchanged by 4.so no of 4 legged=22 and 2 legged=90-22=68 ans

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@TrickBais

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