Question

A prson plans to clear debit of 3600 in 40 installment which are in ap he dies after clearing 30 installment 1÷3rd of debit find the amount of the first installment

Answer 1

let the first installment be a

let the common difference be d

Sn=n/2 [2a+(n-1)d]

sum of the debit is 3600