A man crosses 600m long bridge in 5 minutes. Find his speed.A12 km/hrB7.2 km/hrC9.5 km/hrD6.5 km/hrAnswer: B. 7.2 km/hrRead Explanation:speed=distance/time=600/(5 x 60)=2m/s =2 x 18/5=7.2km/hrOpen explanation in App