Bob and Carol are making glass dolls. On average, they break 12% of the dolls. Today, they only broke 2/3 as many dolls as usual
1 answer:
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Answer:
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
Answer:
14
Step-by-step explanation:
you can do this two ways:
<u>First: </u>
<u>Second: </u>
Distribute the 3 first
Remember, 
, where 
is circumference and tex]d[/tex] is the diameter. They are related by a constant 
(pi).
We can solve the above equation for d and then substitute our known values.
We can solve the above equation for d and then substitute our known values.