How many Cows and Ducks?
Farmer Freddy keeps his cows and ducks in the barn . If there are 13 animals in the barn and altogether they have 34 legs, how many cows and how many ducks does he have?
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Total Animals = 13 and Total Legs = 34
A duck(D) has 2 legs and a Cow(C) has 4 legs.
Total Legs = 2D + 4C = 34
Total Animals = D + C =13 -> D = 13 – C
2(13-C)+ 4C = 34 -> C = 4
D = 13- 4 =9
So there are 4 Cows and 9 Ducks.
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