Question
The simple interest on a sum of Rs. (6400 + x) invested
for 3 years is Rs. 4,800. If the interest rate is 12.5% per annum, find the value of x.Solution
ATQ,
Simple interest = Sum × rate of interest × time period ÷ 100 ATQ; 4800 = (6400 + x) × 12.5 × 3 ÷ 100 Or, 4800 = (6400 + x) × 0.375 Now divide: 4800 ÷ 0.375 = 6400 + x 12800 = 6400 + x So, x = 6400
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