1.

A car moves with a speed of 30km/h for half an hour and 25km/h for one hour and 40km/h for 2 hour . Calculate the average speed

Answer»

oves with 30 km/h for 30 min means the car trvelled only 15km (i)In 2nd case the travels 25KM/h for one hour means the car travel 25km (ii)In 3rd case the car travels 40km/h for 2 hours means the car travles 40×2 = 80km avg. speed - total DISTANCE travelled/ total time TAKEN 1200m/ 210 = 5.7 km/h



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