A car takes 1 hour to travel 100 km along a main road and then ½ hour to travel 20 km along a side road. What is the average speed of the car for the whole journey
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Speed in 1st case = DISTANCE/ TIME
100/1 = 100km/ hr
Speed in 2nd case = DISTANCE/ TIME
0.5/20 = 0.45km/hr
Average = 100+0.45/2
= 100.45/2
= 50.225km/hr
Hope you understood!
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