if the internal diameter of a cylindrical iron piep is 2.8 cm . If the pipe is melted uniformly by 1 mm then it formed a cylindrical rod ,find the diameter of the new rod?
1.08 cm
1.08
To find the diameter of the new rod, we need to understand that the change in diameter of the pipe after it is melted uniformly by 1 mm will be the same in all directions.
Since the internal diameter of the cylindrical iron pipe is given as 2.8 cm, the initial diameter of the pipe is 2.8 cm.
To find the final diameter of the rod, we can subtract the change in diameter from the initial diameter.
Given that the pipe is melted uniformly by 1 mm, we need to convert the millimeter value to centimeters (since the initial diameter is given in centimeters).
1 mm = 0.1 cm
Subtracting the change in diameter from the initial diameter:
Final diameter = Initial diameter - Change in diameter
= 2.8 cm - 0.1 cm
= 2.7 cm
Therefore, the diameter of the new rod is 2.7 cm.