By using the formula, find the amount and compound interest on:
The value of a machine depreciates at the rate of 10% per annum. It was purchased 3 years ago. If its present value is Rs 291600. for how much was it purchased ?
The value of a machine depreciates at the rate of 10% per annum. It was purchased 3 years ago. Its present value is Rs. 43740, find its purchased price.
The value of a refrigerator which was purchased 2 years ago, depreciates at 12% per annum. If its present value is Rs. 9680, for how much was it purchased?