A body starting from rest moves with constant acceleration. The ratio of distance covered by the body during the 5th sec to that covered in 5 sec is
Distance covered in 5th second
S5th=u+a2(2n−1)=0+a2(2×5−1)=9a2
and distance covered in 5 second,
S5=ut+12at2=0+12×a×25=25 a2
∴S5thS5=925