Question 7 A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained.
Open in App
Solution
When a right-angled ΔABC is revolved about its side 12 cm, A cone with height (h) as 12 cm, radius (r) as 5 cm and slant height (l)13 cm will be formed. Volume of the cone =13πr2h =[13×π(5)2×12]cm3 =100πcm3 Therefore, the volume of the cone so formed is 100πcm3.