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A car travels 30 km at a uniform speed of 40km/h and the next 30 km at a uniform speed of 20km/h. Find its average speed. |
| Answer» SPEED = distance travelled/TIME taken1st time taken = time = distance/ speed time = 30/40 = 3/4 hour or 45 minutesnow 2nd time= time = distance/speed30/20 0R 90 minsnow distance travelled/time taken(30 km + 20 km) / 3/4 + 3/2 = 50/9/4 average speed = 200/9 km/h PLZ MARK IT AS BRAINLIST PLZ | |