A particle moves according to the equation `x= a cos pi t`. The distance covered by it in `2.5` s is

A particle moves according to equation x = A cos pi t . The distance covered by it in 3.5 s is

A particle moves according to the law x = acos (pi) / (2) The distance covered by it in the time interval between t=0 to t=3s is

A particle moves according to the law x = rcos (pi)t/(2) The distance covered by it in the time interval between t=0 to t=3s is