Question

Solve only no. 8
Ex 13.7
Class 9​

Answer 1

Answer:

Let ABC right be at right triangle be B .

Ac will be hypotenuse AC=13cm

and AB = 12 cm , BC=5cm

We revolve the triangle ABC about the side BC (=5cm )

we get a cone as shown in the picture

Radius =12

Height =5Cm ...

hope it helps you plz mark me as brainliest

Answer 2

Answer:

here your answer

5:12

Step-by-step explanation:

when right angle ΔABC is revolved about it's side 5cm, a cone will be formed having radius (r) as 12cm, height (h) as 5cm, and slant height (l) 13cm.

volume of cone = ⅓πr²h

[⅓ x π x (12)²x 5]cm³

240π cm³

therefore, the volume of the cone so formed is 240π cm³

required ratio = 100π/240π

5/12= 5:12

hope it's will help u

$answer \: by \: eric \: taeyong$