What is the length of material in yards delivered by a roll with a speed of 290 rpm and a diameter of 46 mm? (note: assume the roll turns for 90 seconds.)

The length of material is 68.7 yards.

Step-by-step explanation:

If the material is delivered in a roll, we can calculate how many material is delivered by turn (one rotation). In one turn it delivers (π*D) of material, its perimeter.

If the diameter is 46 mm, in one turn the material delivered is

As we know the rotational speed, we can calculate the amount of material delivered by unit of time:

If the roll turns for 90 seconds (or 1.5 min) we can calculate

As we need the result in yards, we can convert (1 yard=914.4 mm)

20%

step-by-step explanation:

the answer is 2/54

step-by-step explanation: