arithmetic - the value of a machine depreciates at the rate of 10 per annum if its present value is rs 81000 what will be its worth after 2 ears what was the value of the machine 2 years ago - skillgun

Solution: Value of the machine after 2 years = Rs.[81000(1 - 10/100)^2]
= Rs. 81000*9/10 * 9/10 = Rs. 65610.
Value of the machine 2 years ago = Rs. 81000/(1 - 10/100)^2
= Rs. 81000 * 10/9 * 10/9 = Rs. 100000