Question

The value of a property decreases every year at the rate of 5 %. If its present value is rupees 411540 ,what was it's value three years ago?

Answer 1

let 'x' be the value of the property an year ago
then (x) - 5%(x) = 411540
hence (x) = 433200

now let 'y' be the value of the property 2 years ago
then (y) - 5%(y) = 433200
hence (y) = 456000

now let 'z' be the value of the property 3 years ago
then (z) - 5%(z) = 456000
hence (z) = 480000
Therefore the value of the property 3 years ago is 480000