The cost price of an LCD TV set is ₹ 100000. If its price value depreciates at the rate of 10% pa. then what will be the price at the end of 3 yr?

₹ 80000
₹ 85000
₹ 90000
₹ 72900

Correct Answer: ₹ 72900

Explanation:

Given P = ₹ 100000, R = 10%, n = 3 yr
According to the formula,
Price of LCD TV set after 3 yr. = P(1 - R/100)ⁿ
= 100000 (1 - 10/100)³
= 100000(90/100)³
= 100000 x (9/10) x (9/10) x (9/10)
= ₹ 72900

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