Question
A sum was put a simple interest at a certain rate for 2 years. Had it been put at 4% higher rate, it would have fetched Rs. 60 more. The sum is:
A sum was put a simple interest at a certain rate for 2 years. Had it been put at 4% higher rate, it would have fetched Rs. 60 more. The sum is:
Answer: Option A
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Answer : Option A
Explanation :
Let the sub be Rs.x and the initial rate be R%.Then
$MF#%\begin{align}&\dfrac{\text{x}\times (\text{R+4}) \times 2}{100} - \dfrac{\text{x}\times \text{R} \times 2}{100} = 60\\\\ &\Rightarrow \dfrac{\text{x}\times 4 \times 2}{100} = 60\\\\ &\Rightarrow \dfrac{\text{x} \times 2}{100} = 15\\\\ &\Rightarrow 2x = 1500\\\\ &\Rightarrow x = 750\end{align}$MF#%
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