CTS Company Numerical Ability Time Distance and Speed

A man can row 8 km/hr in still water. If the river is running at 3 km/hr, it takes 3 hours more in upstream than to go downstream for the same distance. How far is the place?
a) 26.67 km
b) 32.5 km
c) 27.5 km
d) Can't determined
e) None of these.

Read Solution (Total 3)

c) 27.5

Speed of man in still water= 8 km/hr ,Speed of stream=3 km/hr
So upstream speed=8-3=5 km/hr and downstream speed=8+3=11 km/hr
If distance a man rows=x km, then
Given, Time taken for upstream=3+ Time taken for downstream
x/5 =3+ (x/11)
x=27.5
8 years agoHelpfull: Yes(9) No(2)

Take d as distance.

=> d/(8+3) - d/(8-3) = 3

=> d=55/2 = 27.5 KM
5 years agoHelpfull: Yes(1) No(0)
The time difference between upstream and downstream is 3hr so,
Downstream = u +v = 8+3= 11
Upstream = 8-3=5 ,
Now,we know s=d/t , so t=d/s
D=x
x/5 - x/11 = 3 ,by solving
6x = 55 * 3
x= 27.5
6 years agoHelpfull: Yes(0) No(0)

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