There are 10 more penguins than buffaloes in a zoo. If there is a total of 92 legs, how many penguins are there in the zoo?
|
Buffaloes |
Penguins |
Total |
Number |
1 u |
1 u + 10 |
|
Value |
4 |
2 |
|
Total value |
4 u |
2 u + 20 |
6 u + 20 |
Number of buffaloes = 1 u
Number of penguins = 1 u + 10
Number of buffaloes' legs
= 4 x 1 u
= 4 u
Number of penguins' legs
= 2(1 u + 10)
= 2 u + 20
Total number of legs
= 4 u + 2 u + 20
= 6 u + 20
6 u + 20 = 92
6 u = 92 - 20
6 u = 92 - 20
6 u = 72
1 u = 72 ÷ 6 = 12
Number of penguins
= 1 u + 10
= 12 + 10
= 22
Answer(s): 22