SOLUTION: 4 shovels of sand are used for every 5 shovels of gravel in making cement. How many shovels of gravel are needed for 64 shovels of sand? _______shovels of gravel are needed. Than

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 4 shovels of sand are used for every 5 shovels of gravel in making cement. How many shovels of gravel are needed for 64 shovels of sand? _______shovels of gravel are needed. Than      Log On


   

Question 40222: 4 shovels of sand are used for every 5 shovels of gravel in making cement. How many shovels of gravel are needed for 64 shovels of sand?
_______shovels of gravel are needed.
Thanx
Answer by vidhyak(98) About Me  (Show Source):
You can put this solution on YOUR website!

4 shovels of sand are used for every 5 shovels of gravel
4s : 5g

How many shovels of gravel are needed for 64 shovels of sand?
64s : Xg

We need to calculate the value of X
4s : 5g
64s : Xg

4s.Xg = 5g.64s
X = (5g*64s)/4sg

= 5*64/4
= 5*16
= 80

___80____shovels of gravel are needed.