The volume of a cylindrical rod is 628 cm cube If its height is 20 cm , find the - Maths - Surface Areas and Volumes

Question

The volume of a cylindrical rod is 628 cm cube If its height is 20
cm , find the radius of its cross section ( use pie = 3 14)

Manbar Singh · Accepted Answer

Let r be the radius of the base of the cylindrical rod
Now, height of the rod = h = 20 cmNow, volume of rod = 628 cm3⇒πr2h = 628⇒3
14 × r2 × 20 = 628⇒62
8 r2 = 628⇒r2 = 6280628 = 10⇒r = 10 cm

The volume of a cylindrical rod is 628 cm cube .If its height is 20 cm , find the radius of its cross section . ( use pie = 3.14) .