Question

Question
or the end of a ruler is broken then start reading from 22. am The Mnal reading of a pencil is 87 cm What will be the
actual reading of the pencil
0 (1) 10 %.com
0 (2) 69cm
0 (3) 65 cm
0 (4) 10 9 mm​

Answer 1

Answer:

2 is the correct answer pls follow and thank

Answer 2

Answer:

(a) To measure the length of a pencil using a metre rule, place metre rule with its marking close to the object. Here, let PQ e a pencil.

The end P of the pencil coincides with the zero mark on the ruler. The end Q of the pencil is read by keeping the eye at the position B vertically above the end Q.

So, the length of pencil is 4.3cm.

(b) The ends of the ruler get damaged with use and its zero mark may not be visible. To measure the length of an object with such a ruler, the object is placed close to a specific markings on the ruler and positions of both ends of the object are read on the ruler.

The difference between the two readings gives the length of the object. In the figure shown below, the reading on ruler at the end X is 1.0cm and at the end Y is 4.3cm. So the length of the rod XY is 4.3 - 1.0 = 3.3cm.