A bus moves 300 km at a speed of 45km/h and then it increases its speed to 60 km/hr to travel another 500 km. Find the average speed of the bus.
(A) 15 km/hr (B) 53.3 km/hr (C) 12 km/hr (D) 17.8 km/hr
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Step-by-step explanation:
option d
use the formula 2v1v2/v1+v2
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