Reshma saved $R s . 450$ in the first month and increased her savings by $R s . 20$ every next month. How much will she be able to save in $12$ months?

5200

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4020

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6720

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1120

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Solution

The correct option is B $6720$
Given Reshma saved Rs. $450$ in the first month and increased her savings by Rs. $20$ every next month.
So we have an A.P. whose first term is $450$ and common difference is $20$ .
After $12$ months she will be able of save an amount of Rs.
$\frac{12}{2} (2.450 + (12 - 1) .20)$
$= 6 (1120)$
$= 6720$ .

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Reshma saved Rs.450 in the first month and increased her savings by Rs.20 every next month. How much will she be able to save in 12 months?

The correct option is B 6720Given Reshma saved Rs. 450 in the first month and increased her savings by Rs. 20 every next month. So we have an A.P. whose first term is 450 and common difference is 20.After 12 months she will be able of save an amount of Rs.122(2.450+(12−1).20)=6(1120)=6720.

Reshma saved $R s . 450$ in the first month and increased her savings by $R s . 20$ every next month. How much will she be able to save in $12$ months?