Mathematical problems about roller in the three-year final exam of Huangyan Primary School in Taizhou City

The front wheel width of the roller is 1.5m, and the diameter is 2m. Now you have to press the road, and roll 15 times per minute at work. How many meters will you advance in half an hour?

The circumference of the front wheel of the roller is:

3.14× 2 = 6.28m.

Distance traveled by roller for half an hour:

6.28×15× 30 = 282.6m.

In this problem, the width of the front wheel of the roller is an irrelevant quantity for interference.

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