Question

The outside diameter of an electrical conduit is 6.3 centimeters. The thickness of the conduit is 0.4 centimeter. Find the inside diameter of the conduit. Carry the answer to one decimal place.​

Answer 1

5.5 cm

Explanation:

You want the inside diameter of a conduit with an outside diameter of 6.3 cm and a wall thickness of 0.4 cm.

Walls

There is a wall at each end of the inner diameter, so it will differ from the outside diameter by twice the wall thickness:

6.3 cm - 2×0.4 cm = 5.5 cm

The inside diameter is 5.5 cm.