Carol puts some green cubes and red cubes in a box. The ratio is 2:1. She adds 12 more cubes to the red cubes in the box and the ratio becomes 4:5. How many gre
Mathematics
milanjordan3624
Question
Carol puts some green cubes and red cubes in a box. The ratio is 2:1. She adds 12 more cubes to the red cubes in the box and the ratio becomes 4:5. How many green cubes were in the box?
1 Answer

1. User Answers riki132132
Answer:
16 green cubes are in the box.
Stepbystep explanation:
No. of red cubes at first (x):
4(x + 12) = 5(2x)
4x + 48 = 10x
6x = 48
x = 8
No. of green cubes:
= 8 * 2
= 16
Answer: 16 green cubes are in the box.
20 red cubes are in the box in the end.
Proof (the ratio in the end is 4:5):
= 16 is to 20
= 16/4 is to 20/4
= 4 is to 5