Question

Ram Prasad saved rupees 10 in the first week of the year and then increased his weekly savings by rupees 2.75. If in the nth week, his savings become rupees 59.50. Find n.​

Answer 1

a = 10, d = 2.75 , an = 59.50

an = a+(n-1)d

10+(n-1)2.75 = 59.50

10+2.75n -2.75 = 59.50

2.75n= 59.50+2.75-10

2.75n= 49.50+2.75

2.75n = 52.25

n = 52.25/2.75

$n = \frac{52.25}{2.75} = \frac{5225}{275} \\ n = 19$

hence in19 weeks his savings become rupees 59.50

Answer 2

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