Question

Find the volume of a rail of uniform cross-section given area of cross-section 12.8 cm² and length 1.26 cm.

Answer 1

Given: Area of cross-section A = 12.8 cm², Length L = 1.26 cm.

Step-wise calculation: Volume V = A × L

1. V = 12.8 cm² × 1.26 cm

2. As fractions: `(128/10) xx (126/100)`

= `(128 xx 126)/1000` 

= `16128/1000`

3. V = 16.128 cm³

The volume of the rail is 16.128 cm³.