Question
A person invested Rs. 16500 in the simple interest for 3
years at the rate of 19% per annum. If the interest received is Rs. 940Z, then find the value of Z 2 . (Note- Z is the unit digit of the number "940Z".)Solution
S.I = P * R * T/100
= Rs. 16500 * 19 * 3/100
= Rs. 9405
S.I = Rs. 940Z = Rs. 9405
So, Z = 5
Hence, Z 2 = 25
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