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Instantaneous Velocity

#8203;A boy g...

Question

A boy goes from his house to his school at a speed of 18 km/h and reaches there in 20 minutes. How far is the school from his house? (A) 7 km (B) 6 km (C) 8 km (D) 3 km
hurry up tomorrow is my exam.

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Solution

Dear Student ,
The given data is velocity , V = 18 km/hr = $18 \times \frac{5}{18} = 5 m / s$ and time taken t = 20 mins = $20 \times 60 = 1200 s e c$
So the distance travelled by the boy is equal to the distance between his school and his house .
So , distance between his house and school is , $S = V t = 5 \times 1200 = 6000 m = 6 K m$
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