There are 2 more penguins than buffaloes in a zoo. If there is a total of 94 legs, how many penguins are there in the zoo?
| |
Buffaloes |
Penguins |
Total |
| Number |
1 u |
1 u + 2 |
|
| Value |
4 |
2 |
|
| Total value |
4 u |
2 u + 4 |
6 u + 4 |
Number of buffaloes = 1 u
Number of penguins = 1 u + 2
Number of buffaloes' legs
= 4 x 1 u
= 4 u
Number of penguins' legs
= 2(1 u + 2)
= 2 u + 4
Total number of legs
= 4 u + 2 u + 4
= 6 u + 4
6 u + 4 = 94
6 u = 94 - 4
6 u = 94 - 4
6 u = 90
1 u = 90 ÷ 6 = 15
Number of penguins
= 1 u + 2
= 15 + 2
= 17
Answer(s): 17
