a algebra que plz of std 10th
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here is your answer !!!!
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Step-by-step explanation:
See it is a simple question of Arithmetic Progression In which terms are in this way-
1st term= 20
2nd term= 19
3rd term= 18
First we need to find the no terms and then the last term as asked
Sum of Terms= 200
no of terms= n
(n/2)(2a+ (n-1)d)= 200
d=-1
n = 25, 16
But if 25 will be taken then last term will be negative therefore not possible. therefore number of rows are 16 and 1st row will have 5 seat only
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