SOLUTION: two concentric circles with centre O and radius r and R respectively. if R=3r, express the area of the shaded part in terms of π and r

SOLUTION: two concentric circles with centre O and radius r and R respectively. if R=3r, express the area of the shaded part in terms of π and r

Algebra.Com

Question 1132551: two concentric circles with centre O and radius r and R respectively. if R=3r, express the area of the shaded part in terms of π and r
Answer by ikleyn(52803) (Show Source): You can put this solution on YOUR website!
.

I assume that the shaded area is between the circles.


Then its area is   -  =  -  =  -  = .     ANSWER

Solved.

RELATED QUESTIONS
The figure below shows two sectors in which CD and EF are arcs of concentric circles,... (answered by ikleyn)

There is square and in the square there is 4 equal small circles touching each other and... (answered by solver91311)

Inside a circle, with centre O and radius r, two circles with centres A and B are drawn,... (answered by ikleyn)

this accuplacer sample question is driving me nuts: two concentric circles have the same... (answered by dabanfield)

both circles have the same center and the radius of the larger circle is R. if the radius (answered by Fombitz)

You will have to go here for the diagram:... (answered by ccs2011)

Two concentric circles( bigger and smaller) have radius R and r respectively. Determine... (answered by greenestamps)

four concentric circles r given .the radius of 1st circle is x.next is 2x,then 3x and... (answered by solver91311)

Two concentric circles are drawn so that the inner circle is shaded. The shaded area is... (answered by josgarithmetic)