Here, radius of the cover (r)=28 ~cm and central angle (θ)=6360∘​=60∘ triangle with side 28 cm .therefore Area of one designed segment = Area of sector OPQ -Area of the OPQ =360∘60∘​×π×(28)2−43​​×(28)2 =(28)2×(6π​−43​​)=(28)2×(7×622​−41.7​) =282×(2111​−41.7​)=28×28×(8444−35.7​) =1228×28×8.3​=77.47 cm2 therefore Total area of 6 designed segments=6×77.47=464.82 cm2 therefore Cost of making the designs=₹ 464.82 * 0.35=₹ 162.69 .