There are 4 times as many pigs as chickens.
There are 450 legs altogether.
- Find the number of animals.
- Find the number of more pigs than chickens.
- Find the number of more pigs' legs than chickens' legs.
|
Pigs |
Chickens |
Total |
Number (Number of animals) |
4 u |
1 u |
5 u |
Value (Number of legs) |
4 |
2 |
|
Total value (Total number of legs) |
4 x 4 = 16 u |
1 x 2 = 2 u |
18 u |
(a)
Let the number of chickens be 1 u.
Number of pigs = 4 u
Number of pigs' legs = 4 x 4 u = 16 u
Number of chickens' legs = 2 x 1 u = 2 u
Total number of legs = 16 u + 2 u = 18 u
18 u = 450
1 u = 450 ÷ 18 = 25
Number of animals
= 4 u + 1 u
= 5 u
= 5 x 25
= 125
(b)
Number of more pigs than chickens
= 4 u - 1 u
= 3 u
= 3 x 25
= 75
(c)
Number of more pigs' legs than chickens' legs
= 16 u - 2 u
= 14 u
= 14 x 25
= 350
Answer(s): (a) 125; (b) 75; (c) 350