Question

If all students of one class together and save Rs.32 per month,how many rupees will be collected in 10 months

Answer 1

Answer:

your answer is 50

Step-by-step explanation:

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Answer 2

Answer:

first term a=32 and common difference d=36−32=4.

Let it take n months to saves Rs. 2000.

∴Sn

= 2n

[2a+(n−1)d]=2000

⇒ 2n

[2×32+(n−1)×4]=2000

⇒n[2n+30]=2000

⇒n[n+15]=1000

⇒n 2

+15n−1000=0

⇒(n+40)(n−25)=0

⇒n=−40,25

But n=-40 being negative integer is not possible.

∴n=25