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Ramzan drives 55 km at an average speed of 120 km/h and then 6 km at 40
km/h without stopping.
What is the average speed for the whole journey to 1 dp?
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1 Answer

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100.3 km/hr average

Step-by-step explanation:

TIME at 120 km/hr = 55/120 hr

TIME at 40 km/hr = 6 / 40 hr

TOTAL distance / TOTAL time = average speed

(55 + 6 km) / ( 55/120 + 6/40 hr) = 100.3 km/hr
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