Question
The C.I on a sum of Rs. 6400 becomes Rs. 1276.5625 in 9
months. Find the rate of interest, if the rate of interest is compounded quarterly?Solution
P = Rs 6400 T = 9 months = 3/4 years C.I = Rs 1276.5625 Amount = C.I + P Amount = 6400 + 1276.5625 Amount = Rs 7676.5625 A = P`(1+r/(4xx100))` 4t 7676.5625 = 6400`(1+r/400)^(4xx3/4)` `76765625/64000000` = `(1+r/400)` 3 `614125/512000` = `((400+r)/400)` 3 `(85/80)^3` = `((400+r)/400)` 3 `85/80` = `(400+r)/400` 85 × 5 = 400 + r r = 425 – 400 r = 25% p.a
More Compound Interest Questions
11 36 112 336 1011 3036
105 112 133 168 216 280 357
...- Find the wrong number in the given number series.
60, 75, 101, 150, 210, 285 2 4 11 37 150 771
...154 165 143 175 132 187
...- Find the wrong number in the given number series.
85, 117, 170, 244, 339, 465 164, 141, 122, 105, 92, 80
132, 130, 136, 126, 142, 110
-1236, -724, 5, 1005, 2336, 4062
124, 143, 168, 202, 242, 289
Relevant for Exams:
