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32. Pratibha covers a distance of 24 km at 8 km/hr, a distance of 18 km at 9 km/hr and'a distance of 12 km at 3 km/hr. What is her average speed? (Bank P.O. 2008)(a) 8 km/hr (6) 5.5 km/hr (c) 3 km/hr (d) 6 km/hr (e) of theseno11 con1 |
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Answer» Total time taken= Distance/speed= 24/8 + 18/9 + 12/3= 3 + 2 + 4= 9 hrs Total Distance covered= 24 + 18 + 12= 54 Therefore,Average speed= Total Distance/Total time= 54/9= 6 km/hr (d) is correct option D) is the correct answer |
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