How to calculate root 10 without scientific calculator?

Prachi Srivastava (Finance) (368 Points)

26 November 2014  

Hi All,

While doing a problem in AS 12(Government Grants), I need to calculate the Rate of Depreciation using below formula-

Rate of Depreciation=1-(10\sqrt{\,\,}(2.5/10))

i.e. I need to calculate 10th root of 0.25. How do I do this without using Scientific Calculator?