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Time and Distance - General Aptitude

Q1:

A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?

A 3.6

B 7.2

C 8.4

D 10

ANS:B - 7.2

Speed = 600 m/sec.
5 x 60
   = 2 m/sec. Converting m/sec to km/hr (see important formulas section)
   = 2 x 18 km/hr
5
   = 7.2 km/hr.