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In the figure PQ PO1 and O1Q are the dia...

In the figure PQ `PO_1 and O_1Q` are the diameters of semicircles `C_1,C_2 and C_3` with centres at `O_1 ,O_2 and O_3` respectively `C_1 C_2 and C_3` . If PQ = 24 units and the area of the circle `C_4` is A sq. units , then the value of `(8pi)/(4)` is equal ot (here, `PO_1 = O_1Q)`

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