49. The radii of the circular ends of the frustum of a cone of height 45 cm, are 28 cm and 7 cm.
its volume and curved surface area.
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It is given that the radii of the ends of a frustum of a cone 45 cm high are 28 cm and 7 cm. So, from the above diagram, we get height h=PQ=45 cm, radius of larger end r1=PB=28 cm and radius of smaller end r2=QD=7 cm. Now, we will find the slant height l of the frustum of cone using the formula l=√h2+(r1−r2)2
Step-by-step explanation:
It is given that the radii of the ends of a frustum of a cone 45 cm high are 28 cm and 7 cm. So, from the above diagram, we get height h=PQ=45 cm, radius of larger end r1=PB=28 cm and radius of smaller end r2=QD=7 cm. Now, we will find the slant height l of the frustum of cone using the formula l=√h2+(r1−r2)2
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