CBSE Class 10 Answered
A sector of circle of radius 25 cm has angle 115.2 . It is rolled up so that two bounding radii are joined together to form a cone. Find the volume of the solid generated.
Asked by Kumarashish6345 | 29 Dec, 2018, 12:38: PM
Expert Answer
If the sector of circle is rolled and cone is made, then slant height of cone = 25 cm.
Also base circumference of cone = (115.2/360)×2π×25 = 50.265 cm
Hence radius of base circle = 50.265/(2π) = 8 cm
height of the cone =
Volume of cone = (1/3)×π×8×8×23.7 = 1588 cm3
Answered by Thiyagarajan K | 29 Dec, 2018, 01:59: PM
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