 # Aptitude - Aptitude-speed And Distance

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Speed of a man is 10 km/hr in still water. If the rate of current is 3 km/hr, then the effective speed of the man upstream is ?

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• b
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The Speed of a boat in still water is 20 kmph. If it can travel 16 km upstream in 1 hr., What time it would take to travel the same distance downstream?

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• b
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• d

Speed = distance time
Speed of the current is ‘x’ kmph
Upstream  20 - x = 16 + 1 x = 4 kmph
downstream (20 + 4) =16
x = 40 min

The speed of a boat in still water is 8 km/hr. If it speed downstream be 15 km/hr, then speed of the stream is ?

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Speed of the boat downstream = 15 km/hr.
Speed of the boat in still water = 8 km/hr
Let the speed of the stream = y km/hr.
We have, 15 = 8 + y
y = 15 – 8 = 7 km/hr.

The Speed of a boat in still water is 10 kmph. If it can travel downstream 20 kms in the same time as it can travel 12 kms upstream. What is the speed of the current?

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• d

A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

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• b
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• d