Answer:
The answer to your question is 4 times
Explanation:
Data
Capacity = 20 gallons
Number of pints = 40
Process
1.- Use the conversion factor to solve this problem
1 gallon ---------------- 8 pints
20 gallons -------------- x
x = (8 x 20) / 1
x = 160 pints
2.- Divide the result by the number of pints
160/40 = 4
3.- Conclusion
He needs to fill up his truck 4 times