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Haneef has a cumulative bank account and deposits Rs. 600 per month for a period of 4 years. If he gets Rs. 5880 as interest at the time of maturity, find the rate of interest. - Mathematics

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प्रश्न

Haneef has a cumulative bank account and deposits Rs. 600 per month for a period of 4 years. If he gets Rs. 5880 as interest at the time of maturity, find the rate of interest.

योग

उत्तर

Interest = Rs. 58800
Monthly deposit (P) = Rs. 600
Period(n) = 4years or 48months
∴ Deposit for 1month

= P(n)(n+1)2

= 600×48×492
= Rs.705600
Let, rate of interest = r % p.a.
Interest

= Prt100

⇒ 5880 = 705600×r×1100×12
5880 = 588r

∴ r = 5880588 = 10
∴ Rate of interest = 10%p.a.

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अध्याय 2: Banking - Exercise 2.1

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