A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
সমাধান
সঠিক উত্তর: Option B
600 m = 600/1000 km
= 3/5 km
5 minutes = 5/60 = 1/12 hr
Speed = (3/5)/(1/12)
= (3 × 12)/5 km/hr
= 36/5 km/hr
= 7.2 km/hr
= 3/5 km
5 minutes = 5/60 = 1/12 hr
Speed = (3/5)/(1/12)
= (3 × 12)/5 km/hr
= 36/5 km/hr
= 7.2 km/hr
