An important question from ML Agarwal of Class10 for board examination We have been asked A man starts repaying a loan as first installment of Rs. 500. If he increases the installment by Rs 25 every month, what amount he will pay in the 30th installment?
Class 10, ML Agarwal(avichal publication), Arithmetic Progression, Chapter 9, question no. 25
Rajan@2021Guru
A man starts repaying a loan as first installment of Rs. 500. If he increases the installment by Rs 25 every month, what amount he will pay in the 30th installment?
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The first installment of the loan is Rs. 500.
The second installment of the loan is Rs. 525 and so on.
The amount that the man repays every month forms an A.P.
The A.P is 500,525,550,...
First term, a=500, common difference d=25
∴a30=a+(30−1)d=500+(29)(25)=500+725=1225
Thus, the amount to be paid in the 30th installment is Rs. 1225.