Answer: There are 48 cans of pineapple juice he would use.
Explanation:
Since we have given that
Number of cans of pineapple = 2
for which Number of cans of orange juice = 3
So, ratio of cans of pineapple to cans of orange juice is given by
2:3.
Number of cans of orange juice used = 72
Let the number of cans of pineapple juice be 2x
Let the number of cans of orange juice be 3x.
According to question,

so, Number of cans of pineapple juice would be

Hence, there are 48 cans of pineapple juice he would use.