Final answer:
The larger van has 15 seats.
Step-by-step explanation:
Let's denote the number of seats in the smaller van as X and the number of seats in the larger van as Y.
We know that the smaller van makes two trips every morning, so it can transport a maximum of 2 * X people. On the other hand, the larger van makes only one trip, so it can transport a maximum of Y people.
According to the problem, the two vans can transport 57 people maximum. Using this information, we can set up the following equation:
2X + Y = 57
It's also mentioned that the smaller van has 6 more seats than the larger van. So we can express X in terms of Y as:
X = Y + 6
To find the number of seats in the larger van, we need to solve this system of equations. Substituting the value of X in the first equation, we get:
2(Y + 6) + Y = 57
Simplifying the equation:
2Y + 12 + Y = 57
3Y + 12 = 57
3Y = 45
Y = 15
Therefore, the larger van has 15 seats.