दैनिक अभिलेखागार: दिसम्बर 16, 2021

A motor boat takes 2 hours to travel a distance of 9 km downstream and it takes 6 hours to travel the same distance against the current. The speed of…

A boat covers 48 km upstream and 72 km downstream in 12 hours, while it covers 72 km upstream and 48 km downstream in 13 hours The speed of stream…

A man can row 15 km/h in still water and he finds that it takes him twice as much time to row up than as to row down the same…