(28.) Difference between the compound interest and simple
interest on a certain sum for 2 yrs. at 7.5% per annum
is Rs.360. Find the sum.
(a) Rs.62543
(b) Rs.63050
(c) Rs.64000
(d) Rs.64873
29. The difference between compound interest and simple
interest on a sum of Rs.15000 for 2 yrs is Rs.96.
What is the rate of interest per annum?
(a) 6%
(b) 8%
(c) 10%
(d) 12%
Answers
Answered by
5
Answer:
Step-by-step explanation:
28. A = P(1+75/1000)^2 = P(1000+75/1000)^2
A = P(1075/1000)^2 = P*1075/1000*1075/1000
A = P*1155625/1000000
CI = A-P = P*1155625/1000000-P
= 155625*P/1000000
SI = PRT/100 = P*7.5*2/100 = 3*P/20
According to the question,
CI - SI = 360
155625*P/1000000 - 3*P/20 = 360
5625*P/1000000 = 360
P = 360*1000000/5625
P = 64000
ANS. (C) Rs. 64000
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