prettymuslim8487 prettymuslim8487 27-02-2024 Physics contestada If a person travels for 30 minutes at the speed of 2 km/hr, and then travels for 20 minutes at the speed of 40 km/hr, what is his average speed? a) 2/3 km/hr b) 8 km/hr c) 20 km/hr d) 30 km/hr