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GMAT Rates And Work — practice questions

2 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.

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A train travels 240 km at 80 km/h, then 180 km at 60 km/h. The average speed for the entire journey is:Working alone, pipe A fills a tank in 6 hours and pipe B in 9 hours. Working together, they fill the tank in: