Question

A cylindrical coil of copper wire has 700 turns of diameter 4 cm

a. Use the value 22/7 for pi to find length of the wire

Answer 1

8800 cm

Explanation:

length of one turn = circumference of the circle =
`\pi` x diameter = 4
`\pi`

So 700 turns = 700 x 4
`\pi` = 2800
`\pi`

You are told to use 22/7 for
`\pi`

Therefore, length of the wire = 2800 x 22/7 = 8800 cm