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a wooden toy rocket in the shape of a cone mounted on a cylinder. the height of the entire rocket is 26 cm while the height of the. conical part is 6cm. the base of the conical portion has a diameter of 5 cm while the base diameter of the cylindrical portion is 3cm |
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Answer» Answer: Area to be painted ORANGE = Curved surface area of the cone + Base area of the cone − Base area of the CYLINDER Area to be painted yellow = Curved surface area of the cylinder + Area of ONE BOTTOM base of the cylinder Curved surface area of cone =πrl l=62+2.52 l=36+6.25 l=42.25 l=6.5 cm Curved surface area of cone =3.14×2.5×6.5 =51.025 cm2 Base area of cone = Area of CIRCLE =πr2 =3.14×(2.5)2 =3.14×6.25 =19.625 cm2 Curved surface area of cylinder =2πrh =2×3.14×1.5×20 =188.4 cm2 Base area of cone = Area of circle =πr2 =3.14×(1.5)2 =7.065 cm2 Area to be painted orange = Curved surface area of the cone + Base area of the cone − Base area of the cylinder =51.025+19.625−7.0625 =63.59 cm2 Area to be painted yellow = Curved surface area of the cylinder + Area of one bottom base of the cylinder =188 this is your answere |
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