A train moving with a velocity of 30km hr had to slow down

Last updated: 6/21/2023

A train moving with a velocity of 30km hr had to slow down to15 km hr du repairs along the way and then after some time regains its original speed If distance covered during retardation be one km and that during acceleration be km the time lost in the journey is A 3 min B 4 min C 2 min D 1 min