Question

Convert 3.5revolutions to radians.

0.55rad
10.99rad
21.98rad
219.8rad

Answer 1

As we know that

$1 revolution = 2\pi radian$

now we know that

$3.5 revolution = 3.5 rev\times \frac{2\pi rad}{1 rev}$

$3.5 rev = 21.98 rad$

so it is 21.98 radian

Answer 2

Answer:

The right answer is 21.98 rad

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