Question : To cover a distance of 225 km in 2.5 hours, what should be the average speed of a car in meters per second?
Option 1: 90 m/s
Option 2: 45 m/s
Option 3: 50 m/s
Option 4: 25 m/s
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Correct Answer: 25 m/s
Solution : Given: Total distance = 225 km Total time = 2.5 hours The formula for average speed = $\frac{\text{Total distance}}{\text{Total time}}$ = $\frac{225}{2.5}$ km/h Now, converting it to meters per second $\frac{225}{2.5}×\frac{5}{18}$ = 25 m/s Hence, the correct answer is 25 m/s.
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