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प्रश्न
₹ 900 is deposited every month in a recurring deposit account at 10% rate of interest, the interest earned in 8 months is ______.
विकल्प
₹ 270
₹ 2,700
₹ 27
₹ 210
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उत्तर
₹ 900 is deposited every month in a recurring deposit account at 10% rate of interest, the interest earned in 8 months is ₹ 270.
Explanation:
Given P = ₹ 900,
n = 8 month's,
R = 10%
∴ Interest (I) = `P xx (n(n + 1))/(2 xx 12) xx R/100`
= `900 xx (8(8 + 1))/(2 xx 12) xx 10/100`
= `900 xx (8 xx 9)/(2 xx 12) xx 10/100`
= ₹ 270
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