224 people went to a museum.
38 were adults. Some children joined halfway and the ratio of the number of adults to the number of children became 6 : 13. How many children joined the museum halfway?
| |
Adults |
Children |
Total |
| Before |
3x2 =
6 u |
5x2 =
10 u |
8x2 =
16 u |
| Change |
|
+ ? |
|
| After |
6 u |
13 u |
|
Fraction of the people that were children at first
= 1 -
38 =
58 Number of adults remains unchanged. Make the number of adults the same. LCM of 3 and 6 is 6.
Total number of people at first = 16 u
16 u = 224
1 u = 224 ÷ 16 = 14
Number of children who joined halfway
= 13 u - 10 u
= 3 u
= 3 x 14
= 42
Answer(s): 42
