Question

the volume of a circular iron rod of length one metre is 3850 cm³. find its diameter​

Answer 1

Answer:

154 cm

Step-by-step explanation:

1 m = 100 cm

πr²l = 3850

(22/7)*r² *(100)= 3850

100* (11/7)r² = 1925

r = √(1925*7*100/11)

= √5929

= 77

Answer 2

Answer:

Step-by-step explanation:

π(r^2)h = 3850

(r^2) x 22/7 x 100 = 3850......[length = 1 m =100 cm]

(r^2) = 3850/100 x (7 / 22)

       = 5929 cm^2

r =  +77 cm [ length cannot be negative]

diameter = 2 x 77 cm = 154 cm