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Q.

Karan wants to measure the length of a box using a ruler as shown in the illustration given below. Where should he place his eyes while measuring the length of the box?

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a

At position A

b

At position B

c

At position C

d

At position D

answer is B.

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Detailed Solution

The correct position of the eye is very important for taking measurements.
Our eyes must be exactly in front of the point where the measurement is to be taken.
The reading will be a little different from positions A, C and D and it will be exact only from point B as the eye is perfectly aligned with the edge of the box.

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Therefore, Karan should place his eyes at point B while measuring the length of the box.

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Karan wants to measure the length of a box using a ruler as shown in the illustration given below. Where should he place his eyes while measuring the length of the box?