Question

20. Ramkali saved 5 in the first week of a year and then increased her weekly savings by
* 1.75. If in the nth week, her weekly savings become * 20.75, find n.
Sum of
irst n Term​

Answer 1

Answer:

saving made first week = 5

Saving made in second week= 5+1.75= 6.75

saving made in third week = 6.75 +1.7=8.50

So ,the series is 5,6.75 ,8.50...

Since differences is same , it is an AP

Common difference = d= 1.5

Given , in nth week ,her savings become Rs. 20.75

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