Ask Question
9 July, 23:33

A classroom has stadium. There are 10 seats in the first row, 13 seats in the second row, 16 seats in the third row and so on. There are 56 rows what is the seating capacity of the class?

The classroom has 4,900 seats.

The classroom has 5,180 seats.

The classroom has 4,995 seats

The classroom has 5,348 seats

+5
Answers (1)
  1. 10 July, 02:32
    0
    B

    5180

    Step-by-step explanation:

    a1 = 10

    n = 56

    d = 3

    L = a1 + (n - 1) * d

    L = 10 + 55*3

    L = 10 + 165

    L = 175

    Sum = (a1 + L) * n/2

    Sum = (10 + 175) * 56/2

    Sum = 185 * 56/2

    Sum = 185 * 28

    Sum = 5180

    The answer is B
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A classroom has stadium. There are 10 seats in the first row, 13 seats in the second row, 16 seats in the third row and so on. There are 56 ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers