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9.A boy leaves from home for school at a distance of 2km he walks with 4 km/h sewing the school closed he comes back with speed 6km/h. Find average velocity and average speed in 30 min, 40 min and 50 min |
| Answer» 9.A boy leaves from home for school at a distance of 2km he walks with 4 km/h sewing the school closed he comes back with speed 6km/h. Find average velocity and average speed in 30 min, 40 min and 50 min | |