Question : A bus travels 720 kilometres in 20 hours. Calculate its average speed in meters per second.
Option 1: 12 m/s
Option 2: 15 m/s
Option 3: 18 m/s
Option 4: 10 m/s
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Correct Answer: 10 m/s
Solution :
Given: A bus travels 720 kilometres in 20 hours.
Applying the formula of $\text{Speed}=\frac{\text{Distance}}{\text{Time}}$, we get,
$\text{Speed}=\frac{720}{20}=36$ km/hr
Converting km/hr into m/s by multiplying it with $\frac{5}{18}$, we get,
$\text{Speed}=36\times\frac{5}{18}=10$ m/s
Hence, the correct answer is 10 m/s.
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