Question
Rekha travels 50 km at 25 km/h by cycle, 100 km at 50
km/h by car, and the remaining 8 km on foot at 4 km/h. Find her average speed for the whole journey. (Rounded off to 2 decimal places)Solution
Total Distance = 50 km + 100km+8km =158 km  Time taken by cycle = 50 km/25km/h = 2 hours  Time taken by car = 100 km/50km/h = 2 hours  Time taken on foot = 8 km /4km/h = 2 hours  Total Time= 2+2+2= 6 hours  Average Speed = 158 km/6 hours = 26.33 km/h
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