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  1. If the difference of the compound interest and the simple interest on a sum of money for 3 years is Rs. 186. Find the sum of money, if the rate of interest in both cases be 10%.
    1. Rs. 5500
    2. Rs. 7200
    3. Rs. 6500
    4. Rs. 6000
Correct Option: D

Given in question , C.I. - S.I. = Rs. 186 , Time = 3 years , Rate = 10%
Using the given formula ,

For 3 years , C.I. − S.I. = P
r
2
r
+ 3
100100

⇒  P
10
2
10
+ 3 = 186
100100

⇒  P
1
×
31
= 186
10010

⇒  P =
186 × 1000
= Rs. 6000
31



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