cycloid cyclic....

Geometry Level 3

Here in the given figure represents two circles of radius 12 cm & 4 cm respectively,find the area region enclosed between the circles and the line in sq cm.


The answer is 18.74.

Nibedan Mukherjee by nibedan mukherjee , 25, USA

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1 solution

Nguyen Thanh Long
Aug 26, 2014

6 ∗ 12 ∗ t a n ( π 6 ) − ( ( π ∗ 1 2 2 6 ) − 1 2 ∗ 12 ∗ 12 ∗ s i n ( π 3 ) ) − ( ( π ∗ 4 2 3 ) − ( 1 2 ∗ 2 ∗ 4 ∗ c o s ( π 6 ) ∗ 4 ∗ s i n ( π 6 ) ) ) = 18.74 6*12*tan(\frac{\pi}{6})-((\frac{\pi*12^2}{6})-\frac{1}{2}*12*12*sin(\frac{\pi}{3}))-((\frac{\pi*4^2}{3})-(\frac{1}{2}*2*4*cos(\frac{\pi}{6})*4*sin(\frac{\pi}{6})))=\boxed{18.74}

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Could you please elaborate?

Jayakumar Krishnan - 6 years, 9 months ago

fine but cpmlex....

nibedan mukherjee - 6 years, 9 months ago

I'm getting a different answer. I dont know what is wrong. I get 92.15 sq cm.

John Phillip Lapidez - 6 years, 9 months ago

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