There are 2 more storks than hippopotamuses in a zoo. If there is a total of 82 legs, how many storks are there in the zoo?
| |
Hippopotamuses |
Storks |
Total |
| Number |
1 u |
1 u + 2 |
|
| Value |
4 |
2 |
|
| Total value |
4 u |
2 u + 4 |
6 u + 4 |
Number of hippopotamuses = 1 u
Number of storks = 1 u + 2
Number of hippopotamuses' legs
= 4 x 1 u
= 4 u
Number of storks' legs
= 2(1 u + 2)
= 2 u + 4
Total number of legs
= 4 u + 2 u + 4
= 6 u + 4
6 u + 4 = 82
6 u = 82 - 4
6 u = 82 - 4
6 u = 78
1 u = 78 ÷ 6 = 13
Number of storks
= 1 u + 2
= 13 + 2
= 15
Answer(s): 15
