3. At the zoo, the ratio of the number of giraffes : lions : penguins is 3:5:11

The total number of legs that these animals have all together is 108.

How many lions are there at the zoo?

Ratio of Giraffes : Lions : Penguins = 3 : 5 : 11

Giraffes = 3x

Lions = 5x

Penguins = 11x

Giraffes = 4 legs

Lions = 4 legs

Penguins = 2 legs

4 (3x) + 4 (5x) + 2 (11x) = 108

12x + 20x + 22x = 108

54x = 108

x = 108 : 54 = 2

Number of lions = 5x = 5 (2) = 10

Answer: 10 lions

6 lions

Step-by-step explanation:

l:g:p = 3:5:11 ratio

4 (3x+5x) + 2*11x = 108 legs

32x+22x = 108

54x = 108

x = 2

Lions = 2*3 = 6