Answer :

Final answer:

It takes 1 second for an automobile engine crankshaft that revolves 3000 times per minute to make 50 revolutions.

Explanation:

To determine how long it takes for an automobile engine crankshaft to revolve 50 times when it revolves 3000 times per minute, we can set up a ratio since the number of revolutions and the time taken are proportional. If the crankshaft revolves 3000 times in one minute (60 seconds), then we can divide 60 seconds by the number of revolutions to find the time for one revolution:

Time for one revolution = 60 seconds ÷ 3000 revolutions = 0.02 seconds per revolution.

Then, we multiply the time for one revolution by the desired number of revolutions (50) to find the total time:

Total time for 50 revolutions = 0.02 seconds/revolution × 50 revolutions = 1 second.

Therefore, it takes 1 second for the crankshaft to revolve 50 times.

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