If simple interest on ₹ 600 for 4 years and on ₹ 600 for 2 years combined together is ₹ 180, find the rate of… · ABC26GN4015
Subject: General Aptitude · Chapter: Simple Interest · Exam: R.R.B. 2009
If simple interest on ₹ 600 for 4 years and on ₹ 600 for 2 years combined together is ₹ 180, find the rate of interest.
(a)4\%
(b)5\%
(c)5.5\%
(d)6.25\%
Answer
Explanation
Let the rate of be R\% p.a. Then, $\left(\frac{600 \times R \times 4}{100}\right)+\left(\frac{600 \times R \times 2}{100}\right)=180$ $$\begin{aligned} & \Rightarrow \quad 2400 R+1200 R=18000 \Rightarrow 3600 R=18000 \\ & \Rightarrow \quad R=5 \% . \end{aligned}$$
Explanation as extracted from the printed page; notation may be imperfect.
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