A boy goes to school at a speed of 5 km/h… | Answer

Subject

Quantitative Aptitude

Topic

Speed & Distance

A boy goes to school at a speed of 5 km/h and returns to the village at a speed of 4 km/h. If he takes 4 hr 30 min in all, what is the distance between the village and the school?
Reading

ক)

7 km

খ)

10 km

গ)

4 km

ঘ)

5 km

ঙ)

8 km

Explanation

Let the distance between village and school = x km Time taken to travel from village to school at a speed of 5 km/hr = x/5 hr Time taken to travel from school to village at a speed of 4 km/hr = x/4 hr Given: total time taken = 4 hrs 30 minutes

= 4\;\frac{{30}}{{60}}

hours = 9/2 hrs Thus,

\frac{x}{5} + \;\frac{x}{4} = \;\frac{9}{2}

Or, x = 10 km ∴ The distance between village and school = 10 km

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A boy goes to school at a speed of 5 km/h and returns to the village at a speed of 4 km/h. If he takes 4 hr 30 min in all, what is the distance between the village and the school?Reading

A boy goes to school at a speed of 5 km/h and returns to the village at a speed of 4 km/h. If he takes 4 hr 30 min in all, what is the distance between the village and the school?

Explanation

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A boy goes to school at a speed of 5 km/h and returns to the village at a speed of 4 km/h. If he takes 4 hr 30 min in all, what is the distance between the village and the school?
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