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1. The compund interest at 10% per annum on a certain amount of money for two years is TK. 10.50. Then what is the principal amount in TaKa ?
- A. 40
- B. 40
- C. 40
- D. 40
Answer: Option B
Explanation:
let, capital = x
1st year interest = x*10/100 = x/10
2nd year interest = (x + x/10)10/100
= 11x/100
ATQ,
x/10 + 11x/100 = 10.5
= > x = 50
1st year interest = x*10/100 = x/10
2nd year interest = (x + x/10)10/100
= 11x/100
ATQ,
x/10 + 11x/100 = 10.5
= > x = 50
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