Question

the volume of a cular iron rod of length 1m is 3850 cm cube find it's diameter

Answer 1

circular iron rod length =h =1m =100cm
let the radius = r cm
given volume =3850 cu cm

(pi*r^2*h)= 3850
(22/7 *r^2*100)= 3850
r^2=(3850*7)/(22*100)
r^2=(7/2)^2
r=7/2 cm

Therefore
diameter =d=2 r
d=2*7/2
d=7cm