IBPS Clerk Prelims 4 Oct 2025 Shift 1 Paper

Concept:Simple interest is calculated using the formula $SI = \frac{P \times R \times T}{100}$, where $P$ is the principal, $R$ is the rate of interest, and $T$ is the time in years.Explanation:First, find the value of $x$ using the given details.Given: $P = \text{Rs. }1600$, $T = 5$ years, $\mathrm{SI} = \text{Rs.}840$, and rate $= x\%$.Substitute these values into the formula:$840 = \frac{1600 \times x \times 5}{100}$$840 = 80x$$x = \frac{840}{80} = 10.5\%$Now, the new rate becomes $(x + 5)\% = (10.5 + 5)\% = 15.5\%$.The principal remains the same, which is $\text{Rs. }1600$, and the new time is $3$ years.Calculate the new simple interest:$SI = \frac{1600 \times 15.5 \times 3}{100}$$SI = \frac{1600 \times 46.5}{100}$$SI = \frac{74400}{100} = 744$Answer:The required simple interest is $\text{Rs.}744$.Hence, the correct option is A. 744.