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.

Question

cdquestions Admin · Accepted Answer

When right-angled  $∆ABC$  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 cone=  $\frac{1}{3}\pi$ r²h =  $\frac{1}{3}$  ×  $\pi$  × 5 cm × 5 cm × 12 cm = 100 $\pi$  cm³ Volume of the cone is 100 $\pi$  cm³

Length (in hours)	Number of lamps
300 − 400	14
400 − 500	56
500 − 600	60
600 − 700	86
700 − 800	74
800 − 900	62
900 − 1000	48

Length (in hours)	Number of lamps
300 − 400	14
400 − 500	56
500 − 600	60
600 − 700	86
700 − 800	74
800 − 900	62
900 − 1000	48

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.

Solution and Explanation

Top CBSE Class IX Mathematics Questions

Top CBSE Class IX Questions