Answer:
60 kg of cement, 180 kg of sand and 240 kg of gravel
Step-by-step explanation:
x : 3x : 4x
If you turn this into an equation, it becomes x + 3x + 4x = 480
8x = 480
x = 60
60 is the amount for the cement, for the sand and gravel multiply this answer by 3 and the other by 4, you should get 180 and 240
Sorry if this was not clear
