A car travels with speed of 30km/hr for 3 hours and then with a speed of 40km/hr for 2 hours.What was his average speed for the whole journey ?
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Answer:
40 kph * 2 hr = 80 km
60 kph * 3 hr = 180 km
2 hr + 3 hr = 5 hr
80 km + 180 km = 260 km
avg vel = 260 km / 5 hr
avg vel = 52 kph
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