Question

the volume of circular iron rod of length 1 m is 3850 cm ³ find its radius​

Answer 1

3850= 22/7 × r × r × 100 r2= 3850 × 7/100 × 22 r = 1.75 × 7 r= 3.5cm Therefore diameter = 2 × r Diameter= 2 × 3.5 = 7cm

Answer 2

Given that the length of the circular rod=1m=100 cm

Volume of the rod= 3850 cm

Volume of the cylinder = πr²h, where r is the radius of the cylinder and h Is the height or length of the cylinder.

πr²h= 3850

22/7×r²×100=3850

r²= 3850×7/22×100

r²= 1225/100

r= √ 1225/100

r= 35/10

r=3.5

radius=3.5 cm