20 pounds red licorice and 10 pounds lemon drops.
He can put 4 kids in each of 9 cars and then leave the 10th car empty. Or put 2 kids in 9th car and 2 kids in 10th so all the cars would be filled
A² + b² = c²
5² + 8² = x²
x² = 25 + 64
x² = 89
x = √89
x = 9.43