- 1
- 2
- 3
- …
- 25
- Next Page »
A Learning Portal from Recruitment India
The velocity of a boat in still water is 9 km/hr, and the speed of the stream is 2.5 km/hr. How much time will the boat take to go 9.1 km against the stream?
2hr. 40min
1 hr. 20min
2hr. 48min
1hr. 24min
Answer with explanation
Answer: Option DExplanation
Answer with the Explanation:
ATQ,
Speed of boat in still water (Sb) = 9km/hr Speed of stream (Sc) = 2.5km/hr Distance against the stream = 9.1 km
Note: against the steam = upstream
Now, apply the formula:
The speed of boat upstream = speed of boat – the speed of the stream
The speed of upstream = 9-2.5 = 6.5km/hr Now, time= Distance/speed Time = 9.1/6.5, or 7/5 Or, time = 1[2/5] Or, 1hr + (2/5)*60 = 1hr + 24minutes
Workspace
Michel can swim in still water at the rate of 6km per hour. After swimming in a stream, she realized that she takes twice the time to go upstream as she takes to go downstream. What is speed of the current?
2 km/hr
2.25 km/hr
1.5 km/hr
4 km/hr
Answer with explanation
Answer: Option AExplanation
Workspace
Guddi’s swimming speed in still water to the speed of river is 7:1. She swims 4.2 km up the river in just 14 min. How much time will Guddi take to swim 18.4 km down the river?
12 minutes
11 minutes
46 minutes
23 minutes
Answer with explanation
Answer: Option CExplanation
Workspace