Question

41. Compound interest on a sum at some rate of interest after two years is
Rs.23441.25 and compound interest on Rs.1500 more sum at 20% less rate of
interest for two years is Rs.19152. What is the sum?
a) Rs.25000 b) Rs.28500 c) Rs.32000 d) Rs.35500 e) Rs.27000​

Answer 1

Given : Compound interest on a sum at some rate of interest after two years is rs. 23441.25 and

compound interest on rs1500 more sum at 20% less rate of interest for two years is rs. 19152.

To Find : what is the sum?

a) Rs.25000 b) Rs.28500 c) Rs.32000 d) Rs.35500 e) Rs.27000​

​Solution:

P A=P(1 + R/100)^T   R %       Interest

25000 48441.25   39.2     23441.25

26500 37652.58        19.2      11152.58  ≠ 19152

27000 50441.25    36.682    23441.25

28500 38801.81     16.682     10301.81  ≠ 19152

28500 51941.25      35       23441.25

30000 39675          15          9675  ≠ 19152

32000 55441.25  31.626       23441.25    

33500 41742.18    11.626       8242.18   ≠ 19152

35500 58941.25  28.85        23441.25

37000 43841.44   8.85          6841.44  ≠ 19152

None of the interest amount matches with  19152

Correct option is

P                   A                  R               Interest

9806 33247.25   84.133          23441.25

11306 30458             64.133          19152

Sum is 9806

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