Ramkali saved rs. 5 in the first week of a year and then increased her

1.	Ramkali saved rs. 5 in the first week of a year and then increased her weekly savings by rs. 1.75. If in the nth week, her weekly savings become rs.20.75, find n.
Answer» ANSWER: Ramkali SAVED in 1st WEEK = 5 ₹ and increase PER week = 1.75₹ We absorb here, 5 , 6.75 , 8.5 ,.........20.75 are in AP where, a = 5 , d = 1.75 and Tn = 20.75 Tn = a + ( n -1)d 20.75 = 5 + (n -1)1.75 15.75 = 1.75(n -1) 9 = n -1 n = 10 Step-by-step explanation:

Ramkali saved rs. 5 in the first week of a year and then increased her weekly savings by rs. 1.75. If in the nth week, her weekly savings become rs.20.75, find n.

Answer»

ANSWER:

Ramkali SAVED in 1st WEEK = 5 ₹

and increase PER week = 1.75₹

We absorb here,

5 , 6.75 , 8.5 ,.........20.75 are in AP

where, a = 5 , d = 1.75 and Tn = 20.75

Tn = a + ( n -1)d

20.75 = 5 + (n -1)1.75

15.75 = 1.75(n -1)

9 = n -1

n = 10

Step-by-step explanation:

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Ramkali saved rs. 5 in the first week of a year and then increased her weekly savings by rs. 1.75. If in the nth week, her weekly savings become rs.20.75, find n.

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