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Q:

To go a distance of 40 km upstream a rower takes 8 hours while it takes her only 5 hours to row the same distance downstream. What was the rower's speed in still water?

A) 4.5 kmph B) 4 kmph
C) 6.5 kmph D) 1.5 kmph

Answer:   C) 6.5 kmph



Explanation:
Q:

If a boat goes upstream at a speed of 18 km/hr and comes back the same distance at 30 km/hr. What is the average speed (in km/hr) for the total journey?

A) 22.5 B) 24
C) 20.5 D) 25
 
Answer & Explanation Answer: A) 22.5

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9 1138
Q:

If a boat goes upstream at a speed of 24 km/hr and comes back the same distance at 40 km/hr. What is the average speed (in km/hr) for the total journey.

A) 32 B) 30
C) 31 D) 33
 
Answer & Explanation Answer: B) 30

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4 669
Q:

If a boat goes a certain distance at 30 km/h and comes back the same distance at 20 km/hr, what is the average speed (in km/hr) for the total journey?

A) 25 B) 24.5
C) 24 D) 25.5
 
Answer & Explanation Answer: C) 24

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3 546
Q:

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is

A) 2 hrs B) 3 hrs
C) 4 hrs D) 7 hrs
 
Answer & Explanation Answer: C) 4 hrs

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3 639
Q:

A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man's rowing speed in still water is

A) 15 km/hr B) 5 km/hr
C) 3 km/hr D) 10 km/hr
 
Answer & Explanation Answer: A) 15 km/hr

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3 563
Q:

A boat moves down stream at the rate of 8km/hr. and upstream at 4Km/hr. The speed of the boat in still waters is:

A) 4.5 km/hr. B) 5 km/hr.
C) 6 km/hr. D) 6.4 km/hr.
 
Answer & Explanation Answer: C) 6 km/hr.

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4 584
Q:

Speed of a boat along and against the current are 14 kms/hr and 8 kms/hr respectively. The speed of the current is

A) 11 kms/hr B) 6 kms/hr
C) 5.5 kms/hr D) 3 kms/hr
 
Answer & Explanation Answer: D) 3 kms/hr

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3 774
Q:

If a boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?

A) 45 B) 50
C) 40 D) 35
 
Answer & Explanation Answer: C) 40

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5 1009