A boat covers a certain distance downstream in 2 hours, while it comes back in 5/2 hours. If the speed of the stream be 3/2 km/hr, what is the speed of the boat in still water?

Options
- 12 km/hr
- 14 km/hr
- 16 km/hr
- 18 km/hr

CORRECT ANSWER : 18 km/hr

Discussion Board
Answers

Sd=d/2
Su=d/(5/2)

2x+2y=d
5/2x+5/2y=d

y=3/2km/hr(given)
Solving above equation will give answer 27/2 km/hr




Unknown 09-10-2024 01:47 AM

answer

Td=2hr,Tu=5/2 (Let speed of boat be x)
Td +Tu+9/2
d/x+3/2 +d/x-3/2=9/2
solving the above eqn gives x=18km/hr


hrithik 07-12-2021 01:22 PM

Write your comments


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)


Advertisement
 
▲