Radha was performing an experiment in the Science Laboratory. The metre
scale, that she was using to measure the length of a string, was worn out
between its 1 cm and its 2 cm marks, due to overuse.
(a) She measures the length of a string by keeping its one end at the 3.0 cm
mark. If the other end of the string 'reads 92.8 cm, find the length of the
string.
(b) write the precautions to be followed when a metre scale is being used for measuring a given length
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Answer:
A. Initial marking =3.0cm
final marking =92.8cm
length of a string =final making
= 92.8cm -3.0cm
= 89.8cm
B. Place the scale in such a mannet, So that is divisions are very close the length to be measure, Also the scale in write way straight and be measure the same.
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