A container full of water weighs 20 kg . If one -fourth of the container is full of water. it weighs 8 kg . What is the weight of the empty container?
A
2 kg
B
3 kg
C
4 kg
D
8 kg
Correct Answer: 4 kg
Let, weight of empty container is x. 20 - x /4 = 8 - x 20 - x = 32 - 4x 3x = 12 x = 4