Math, asked by kanakamn, 5 hours ago

A cineplex has 13 rows of seats with 10 seats in first row.12 in second row, 14 in third row.. so on what is the total number of seats in the cineplex

Answers

Answered by working4962

2

Answer:

total number of seats

286

Answered by guptaindranil111

1

Answer:

286 seats

Step-by-step explanation:

S= (n/2)*{2a + (n-1)*d}

This is the formula for sum of n terms of an AP.

Put n=13, a=10 and d=2

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