Question
Ravi deposits Rs. 8,240 on simple interest at 5% per annum
for 4 years. If the total amount he gets back is Rs. '2m', then find the product of the digits of 'm'.Solution
ATQ,
Simple interest = Principal Γ Rate Γ Time Γ· 100
Interest earned = 8,240 Γ 5 Γ 4 Γ· 100 = Rs. 1,648
2m = 8,240 + 1,648
Or, 2m = 9,888
Or, m = 4,944
Required product = 4 Γ 9 Γ 4 Γ 4 = 576
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