There are 2 cogs, connected together by 1 belt. Find the length of the belt.
The large cog has a radius of 11cm. The small cog has a radius of 4cm. The distance between the centre of the 2 cogs is 25cm.
(Diagram not drawn to scale)
I'm stuck because I cannot solve the angle AOB or YPZ, and I cannot solve the length of AY or BZ. Once I get those, then I can get solve the answer.
Can anyone tell me how to get the angle or length?
Does the angle AOB = angle YPZ?
I got for angle AOB and for the reflex angle of YPZ because I assumed they were equal, but it doesn't seem right.