How do I complete this question on arc length?

v ≈ 8.5 km/h

Step-by-step explanation:

Since the diameter of the wheel is 3 m the radius will be r = 1.5 m.

Use the radius of the water wheel to find it's circumference C:

                                              [set r = 1.5 m]

⇒

⇒ m

One revolution of the water wheel corresponds to meters so the angular velocity 15 rmp (revolutions per minute) corresponds to:

= /min

Using this result, the speed of the river in kilometers per hour will be:

×   ×

⇒  

⇒ ≈ km/h

≈ 8 km per hour

Step-by-step explanation:

C = d

C =

Velocity = × 15 = ( meters per minute ) = × 60 ≈ 8.5 km/h

omg what happend to your question? if you could edit this question i can

step-by-step explanation: