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Ramkali saved Rs. 5 in the first week of a year and then incre

Question

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

n = 10

n = 12

n = 16

n = 20

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Camila Discussed

Ramkali saved

R s .5

in the first week of a year and then increased her weekly savings by

R s .1.75.

If in the nth week, her weekly savings become

R s .20.75,

find

n .

12 mins ago

Discuss this question LIVE

12 mins ago

Text solutionVerified

Given that

a = 5

d = 1.75

a_{n} = 20.75

a_{n} = a + (n - 1) d

20.75 = 5 + (n - 1) 1.75

15.75 = (n - 1) 1.75

(n - 1) = \frac{15.75}{1.75} = \frac{1575}{175} = \frac{63}{7} = 9

∴ n - 1 = 9

∴ n = 10

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Question Text	Ramkali saved $R s .5$ in the first week of a year and then increased her weekly savings by $R s .1.75.$ If in the nth week, her weekly savings become $R s .20.75,$ find $n .$
Answer Type	Text solution:1
Upvotes	150