A rope of length 120 m is cut into 3 equal parts. Find the exact length of each part in metres, showing the division clearly.

Introduction / Context:
This is a basic unit-division problem, frequently appearing in simplification sections to confirm careful handling of units and equal partitions.

Given Data / Assumptions:

• Total rope length = 120 m.
• Number of equal parts = 3.
• All parts are exactly equal and measured in metres.

Concept / Approach:
The length of each equal part is the total length divided by the number of parts. No further conversion is necessary because the units are already consistent (metres).

Step-by-Step Solution:

Verification / Alternative check:
Add back: 40 m + 40 m + 40 m = 120 m, which matches the original rope length.

Why Other Options Are Wrong:
30 m and 25 m imply incorrect divisors. 50 m and 60 m would total 150 m or 180 m when tripled, not 120 m.

Common Pitfalls:
Mistakenly subtracting or assuming non-equal parts. The statement clearly says “3 equal parts,” implying direct division.

Final Answer:
40 m