It takes 5 minutes for a person to cross a 600-meter-long street. What is his current speed in kilometres per hour?
A. 3.6
B. 7.2
C. 8.4
D. 10
Answer:B
It takes 5 minutes for a person to cross a 600-meter-long street. What is his current speed in kilometres per hour?
A. 3.6 B. 7.2 C. 8.4 D. 10
Explanation: 600/5 x 60 m/s = 600/5 x 60 m/s = 2 m/sHow to convert m/sec to km/hr (see important formulas section)= 2 x 18 /5 km/h= 7.2 kilometres per hour.