If the speed of a boat in still water is… | Answer

Subject

Quantitative Aptitude

Topic

Speed & Distance

If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is its speed in the direction of the current?
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ক)

14.5 km/hr

খ)

13 km/hr

গ)

14 km/hr

ঘ)

11.5 km/hr

ঙ)

None of these

Explanation

Speed of boat in still water = 7 km/hr Let speed of stream = s km/hr Then speed of boat upstream = 7 – s km/hr And speed of boat downstream = 7 + s km/hr Given that 7 – s = 2.5 Solving the equation, we get b = 4.5 km/hr Hence, speed of stream = 4.5 km/hr Speed of boat in the direction of stream = 7 + 4.5 km/hr = 11.5 km/hr

A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:Speed of a boat in standing water is 9 kmph and the speed of the stream is 5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1/10 km and 9 km respectively. The time taken by slower train to cross the faster train in seconds is -A man can row three-quarters of a kilometre against the stream in 11×(1/4) minutes and down the stream in 7×(1/2) minutes. The speed (in km/hr) of the man in still water is:In a 300 m race A beats B by 5 metre or 6 seconds. B's time over the course is -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 boat covers a certain distance downstream in 1 hour, while it comes back in 1x(1/2) hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?A man buys tk 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is-

If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is its speed in the direction of the current?Reading

If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is its speed in the direction of the current?

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If the speed of a boat in still water is 7 km/hr and its speed against the stream is 2.5 km/hr, then what is its speed in the direction of the current?
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