A block is pushed up a rough inclined plane of 45^(@). If the time of descent is twice the time of ascent, the coefficient of friction is

A block is pushed up a rough inclined plane of 45^(@). If the time of

1.	A block is pushed up a rough inclined plane of 45^(@). If the time of descent is twice the time of ascent, the coefficient of friction is
Answer» `0.6` `0.4` `0.5` `0.25` ANSWER :A