A man saves Rs 360 a month. How much he saves in 15 months using steps
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Answered by
1
Step-by-step explanation:
a=320, d=40
S n=20000
It is required to find n
Sn =20000= n/2[2×320+(n−1)×40]
500= n/2 [15+(n−1)]= n/2 (n+15)
n 2+15n−1000=0
⇒n=25
Answered by
0
money saved in 1 month = RS 360
money saved in 15 months = 360×15
= RS 3780
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