Question

Reshma repays her total loan of rs.175000 by paying it every month starting from the first installment of rs.1500. If she increases the installment by rs.175 every month , what amount will be paid by her in the 21st installment? What amount of loan does she still have to pay after the 21st installment?

Answer 1

Sn=1,75,000

an=1500. d=175

Amount paid in 21st installment= a21

a21=1500+20(175). =1500+3500. = ₹ 5000

Total amount paid till 21st installment = a21

S21= 21/2 [2(1500)+20(175)]

= 21/2 [3000+5000]

= 21/2 (8000). = 21×4000. =₹84000

Amount of loan to be paid after the 21st installment = 1,75,000-84,000

= ₹ 91,000

Answer 2

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