Question

3. Students from 4 classes at Franklin Elementary School are going on a field trip to the theater. Each

class has 30 students. There will also be 6 teachers and 14 parents on the trip. There are 20 seats in
each row at the theater. How many rows should be reserved for the field trip?
A 2
B 7
C 74
D 140

Answer 1

B) 7

Explanation:

Given information:

• Number of classes = 4
• Number of students in each case = 30
• Number of teachers = 6
• Number of parents = 14
• Number of seats per row = 20

If there are 30 students in each class, and there are 4 classes, the total number of students is:

`\begin{aligned}\implies \textsf{Total students}&=\textsf{Students per class} * \textsf{Number of classes}\\&=\sf 30 * 4\\&=\sf 120\end{aligned}`

Therefore, the total number of people going on the trip is:

`\begin{aligned}\implies \textsf{Total number of people}&=\sf Students+Teachers+Parents\\&=\sf 120+6+14\\&=\sf 140\end{aligned}`

As there are 20 seats in each row at the theater, to calculate how many rows should be reserved for the trip, divide the total number of people by the number of seats per row:

`\begin{aligned}\implies \textsf{Rows to reserve}&=\sf (\sf Total\;people)/(\sf Seats\;per\;row)\\\\&=\sf(140)/(20)\\\\&=\sf 7\end{aligned}`

Therefore, 7 rows should be reserved for the field trip.