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:

  1. 116 m 40 cm
  2. 121 m 20 cm
  3. 12 m
  4. 123 m 60 cm
Desire Adnan Default Asked on 2nd August 2015 in Maths.
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1 Answer(s)

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.

Anurag Mishra Professor Answered on 9th August 2015.
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