Two friends F1and F2go from home to templ… | Answer

Subject

Quantitative Aptitude

Topic

Speed & Distance

Two friends F1and F2go from home to temple and return to home. F1travels through a boat which has speed 20 kmph and river flows at 5 kmph while F2travels by a bullock cart which has speed 24 km/hr. Which one of two return to home first ?
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ক)

খ)

গ)

Bothe at same time

ঘ)

Data inadequate

ঙ)

NONE OF THESE

Explanation

Let the distance be ‘D’. Speed of bullock cart = 24 kmph Time taken by F 2 in going to temple and back home= Distance/speed = 2 × D/24 = D/12 = 0.083D Speed of boat=20kmph; Speed of stream= 5kmph Time taken by F 1 in going to temple and back home

= \left[ {\frac{D}{{Upstream}} + \frac{D}{{downstream}}} \right] = \left[ {\frac{D}{{20 - 5}} + \frac{D}{{20 + 5}}} \right] = \frac{{8D}}{{75}} = 0.106D

Clearly, F 2 is taking lesser time. Hence, he will reach first.

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Two friends F1and F2go from home to temple and return to home. F1travels through a boat which has speed 20 kmph and river flows at 5 kmph while F2travels by a bullock cart which has speed 24 km/hr. Which one of two return to home first ?Reading

Two friends F1and F2go from home to temple and return to home. F1travels through a boat which has speed 20 kmph and river flows at 5 kmph while F2travels by a bullock cart which has speed 24 km/hr. Which one of two return to home first ?

Explanation

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Two friends F1and F2go from home to temple and return to home. F1travels through a boat which has speed 20 kmph and river flows at 5 kmph while F2travels by a bullock cart which has speed 24 km/hr. Which one of two return to home first ?
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