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  1. A certain sum at compound interest amounts to ₹ 12960 in 2 yr and ₹ 13176 in 3 yr. Find the rate per cent per annum.
    1. 11/3%
    2. 21/3%
    3. 12/3%
    4. 22/3%
Correct Option: C

SI for on ₹ 12960 for 1 yr
= 13176 - 12960 = ₹ 216
By formula, SI = (P x R x T)/ 100
⇒ 216 = (12960 x R x 1)/100
∴ R = 5/3 = 12/3



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