Question
Manisha covers a distance of 348 km by super fast train
with the speed of 58 km/hr, a distance of 168 km by Garuda bus with the speed of 24 km/hr and a distance of 75 km by electric bike with the speed of 15 km/hr to reach home from her workplace. Find Manisha's average speed throughout her journey (rounded off to two decimal places).Solution
Total distance = 348 + 168 + 75 = 591 km Time by train = 348 ÷ 58 = 6 hours Time by bus = 168 ÷ 24 = 7 hours Time by bike = 75 ÷ 15 = 5 hours Total time = 6 + 7 + 5 = 18 hours Average speed = 591 ÷ 18 = 32.83 km/h
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