Question

Convert 3.5revolutions to radians.

0.55rad
10.99rad
21.98rad
219.8rad

Answer 1

The right answer is 21.98 rad

Step-by-step explanation:

You can see that

2 π radians becomes one revolution when you use the arc length formula:

s=rθ

Let

θ =2π . That means:

s =C=2πr

By putting the values and solving we get 21.98 radians

Answer 2

As we know that

`1 revolution = 2\pi radian`

now we know that

`3.5 revolution = 3.5 rev* (2\pi rad)/(1 rev)`

`3.5 rev = 21.98 rad`

so it is 21.98 radian