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### Question Asked by a Student from EXXAMM.com Team

** Q 1659091814. ** `AD` is the diameter of a circle with area `707m^2`

and `AB = BC = CD` as shown in

the figure. All curves inside the

circle are semi-circles with their

diameters on `AD`. What is the

cost of levelling the shaded

region at the rate of `rs63` per `m^2` `?`

**CDS 2016 **