Question

The volume of circular iron rod of length 1m is 3850 cm3. Find its diameter.

Answer 1

Volume = 3850 cm3
Length i.e. height = 1 m = 100 cm

Volume = πr2h

22/7 x r2 x 100 = 3850
r2 = 3850/100 x 7/22
r2 = 12.25
r = √12.25
r = 3.5

So, the diameter of the rod is 2 x 3.5 i.e. 7 cm.

Answer 2

Answer:

7cm

Step-by-step explanation:

Volume = 3850 cm3

Length i.e. height = 1 m = 100 cm

Volume = πr2h

22/7 x r2 x 100 = 3850

r2 = 3850/100 x 7/22

r2 = 12.25

r = √12.25

r = 3.5

So, the diameter of the rod is 2 x 3.5 i.e. 7 cm.