PSLE Elijah kept his silver and green cubes in two boxes. The ratio of the number of silver to green cubes in the first box was 3 : 7 and it was 1 : 5 in the second box. The two boxes contained the same number of cubes. What fraction of Elijah's cubes were green cubes?
First box |
Second box |
1x30 30 u |
1x30 30 u |
10x3 |
6x5 |
Silver |
Green |
Silver |
Green |
3x3 |
7x3 |
1x5 |
5x5 |
9 u |
21 u |
5 u |
25 u |
The total number of cubes in the first box and the second box is the same. Make the total number of cubes in each box the same.
LCM of 10 and 6 is 30.
Total number of green cubes
= 21 u + 25 u
= 46 u
Total number of cubes
= 30 u + 30 u
= 60 u
Fraction of Elijah's cubes that were green cubes
=
4660 =
2330 Answer(s):
2330