Question

There are 40 flamingos at the zoo.if 3/4 of the flamingos are standing on one leg ,and the rest are standing on both legs. How many flamingo feet are touching the ground ?

Answer 1

30 flamingo's are standing on one leg, 10 are standing on both legs 
10x2=20+30=50
The answer is 50 legs

Answer 2

3/4 of 40 is 30 flamingos in one leg
40-30= 10 flamingo standing in both legs
10 flamingos•2 legs+ 30 flamingos • 1 leg=
20+30= 50 legs are touching the ground