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Q1
:
A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
A
1 hr 30 min
B
40 minutes
C
1 hr 15 min
D
1 hour
Solution
ANS:
C
- 1 hr 15 min
Rate downstream =
1
x 60
km/hr = 6 km/hr.
10
Rate upstream = 2 km/hr.
Speed in still water =
1
(6 + 2) km/hr = 4 km/hr.
2
Required time =
5
hrs = 1
1
hrs = 1 hr 15 min.
4
4
Share :
km/hr = 6 km/hr.
Required time =