Question

the volume of a circular iron rod of length 5 cm is 3850 cm cube find its diameter

Answer 1

for a cylindrical rod
length (l)=5. (given)
radius,r. =?
volume=3850cubic cm

volume of cylinder =π×r×r×h
3850 =22/7×r×r×5
3850/22 =1/7×r×r×5
( 175/5)×7. =r×r
7×7×5 =r×r
7√5 cm =r.

Hence ,radius of cylindrical iron rod is 7√5cm or 15.61 cm