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Question
A man riding his bicycle covers 150 meters in 25 seconds. What is his speed in km per hour?
Options:
A .  20km/hr
B .  21.6km/hr
C .  21.6km/hr
D .  25km/hr
Answer: Option C


Speed = 150/25 m/sec =(150/25 x 18/5)km/hr 
= 108/5km/hr = 21.6km/hr



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