# What is the True Length of the Rope Measured? If

After measuring 120 metres of a rope, it was discovered that the metre rod was 3cm The true length of the rope measured is:

- 116 m 40 cm
- 121 m 20 cm
- 12 m
- 123 m 60 cm

**Answer: (4) 123 m 60 cm**

**Explanation:-**

The length of the rod = 3 cm

To measure 120 m ,

Rod is apply by 120 times .

Therefore, total length that is measure by longer part = 120 x 3

= 360 cm = 360/100 (1 cm = 1/100 m)

= 3.60 m .

Then, the actual length of rope = 120 + 3.6

= 123 m 60 cm

Hence, the answer is (4) 123 m 60 cm.