A man can row 8 Kmph in still water. If the velocity of the current is 2 Kmph and it takes him 2 hours to row to a place and come back. How far is the place?
A). 1.5 km
B). 3.5 km
C). 5.5 km
D). 7.5 km
7.5 km
Man's rate down stream = 8 + 2 = 10 kmph
Man's rate upstream = 8 - 2 = 6 kmph
Let the required distance be X km
Then X/10 + X/6 = 2
3X + 5X = 60
8X = 60
X = 7.5 km
9. An athelete runs 200meters race in 24 seconds. His speed (in km/hr) is