A man travels a distance of 18 km from his house to an exhibition by tonga at 15 km/hr and returns by cycle at 10 km/hr. find his average speed for the whole journey. select one: 11 km/hr 12 km/hr 13 km/hr 10 km/hr
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AVERAGE = SUM/ TOTAL
= 15 + 10/ 2
= 25/2
12.5
So the answer will be either 12 km/h OR 13 km/h
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