19
Question
A man starts repaying a
loan as first installment of Rs. 100. If he increases the installment
by Rs 5 every month, what amount he will pay in the 30th
installment?
A man starts repaying a loan as first installment of Rs. 100. If he increases the installment by Rs 5 every month, what amount he will pay in the 30th installment?
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Solution
The first installment
of the loan is Rs 100.
The second installment
of the loan is Rs 105 and so on.
The amount that the man
repays every month forms an A.P.
The A.P. is 100, 105,
110, …
First term, a =
100
Common difference, d
= 5
A30 = a
+ (30 – 1)d
= 100 + (29) (5)
= 100 + 145
= 245
Thus, the amount to be
paid in the 30th installment is Rs 245.
The first installment of the loan is Rs 100.
The second installment of the loan is Rs 105 and so on.
The amount that the man repays every month forms an A.P.
The A.P. is 100, 105, 110, …
First term, a = 100
Common difference, d = 5
A30 = a + (30 – 1)d
= 100 + (29) (5)
= 100 + 145
= 245
Thus, the amount to be paid in the 30th installment is Rs 245.
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