Answer:
here
Step-by-step explanation:
ratio:
1x, 3x, 5x=180
9x=180
x=180/9
x=20
forgot to mention 1x=cement
3x=sand and 5x=gravel.
I only know first part of the question.
Let the ratio be x,3x,5x
then,
or,x+3x+5x=180kg
or,9x=180
or,x=180/9
or,x=20kg
now,3x=3*20
=60kg
5x=5*20
=100 kg
therefore he doesn't have enough cement and sand but he has enough gravel.
