The lengths of smooth & rough inclined planes of 45^(@) inclination is same. Times of sliding of a body on two surfaces is t_(1), t_(2) and mu = 0.75, then t_(1):t_(2)=

The lengths of smooth & rough inclined planes of 45^(@) inclination is

1.	The lengths of smooth & rough inclined planes of 45^(@) inclination is same. Times of sliding of a body on two surfaces is t_(1), t_(2) and mu = 0.75, then t_(1):t_(2)=
Answer» `2:1` `2:3` `1:2` `3:2` ANSWER :C