a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make

8.1 * 85 = 688.5 revolutions

To find out how many revolutions the wheel will make, we can multiply the number of revolutions it makes in a minute by the total number of minutes it rotates.

The wheel makes 8 1/10 (or 8.1) revolutions per minute.

So, to calculate the total number of revolutions, multiply 8.1 revolutions/minute by 85 minutes:

8.1 revolutions/minute × 85 minutes = 688.5 revolutions

Therefore, the wheel will make approximately 688.5 revolutions.