The wheel circumference of the cart has a length of 18 dm. Calculate how many revolutions per second the wheel makes if it is known that in 1/4 hour it has covered 2.43 km.
Let’s translate these tasks into a single unit of measurement.
18 dm = 0.0018 km.
1/4 hour = 900 sec.
1. Find how many revolutions are made by the wheel in 1/4 hour:
2.43 / 0.0018 = 1350.
2. Find how many revolutions are made by the wheel in 1 second:
1350/900 = 1.5.
Answer: 1.5 turns.
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