A spool of thread contains 150 revolutions of thread. the diameter of the spool is 3 centimeters. find the length of the thread

The circumference is given by:

C = 2 * pi * r

Where,

r: radio

Substituting we have:

C = 2 * (3.14) * (3/2)

C = 9.42 cm

Then, the length is given by the product of the circumference and the number of revolutions.

We have then:

L = (150) * (9.42)

L = 1413 cm

Answer:

the length of the thread is:

L = 1413 cm