A man's speed with the current of a river… | Answer | TuitionWave

Subject

Quantitative Aptitude

Topic

Boat and Stream

A man's speed with the current of a river is 15 km/hr and the speed of the current is 2.5 km/hr. What is the man's speed against the current?
Reading

ক)

8.5 km/hr

খ)

9 km/hr

গ)

10 km/hr

ঘ)

12.5 km/hr

ঙ)

None

Explanation

লোকটির বেগ = ১৫ - ২.৫ = ১২.৫ কি.মি./ঘণ্টা, ∴ স্রোতের প্রতিকূলে লোকটির বেগ = ১২.৫ - ২.৫ = ১০ কি.মি./ঘণ্টা

A barge, when empty, travels twice as fast as when it is full. If it travels 20 miles north with a cargo, spends 30 minutes for unloading, and returns to its original port empty to complete the entire trip taking 8 hours, what is the speed of the barge when it is empty ?

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