How can the height of a person who is six feet tall be expressed (approximately) in nanometers?

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Submitted by examrobotsa on

Q: 126 (IAS/2008)
How can the height of a person who is six feet tall be expressed (approximately) in nanometers?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,12,20,13,7,12,0

keywords: 

{'nanometers': [0, 0, 1, 0], 'height': [0, 0, 1, 2], 'nanometres': [0, 0, 1, 0], 'feet': [1, 1, 3, 4], 'person': [3, 1, 18, 13]}

Explanation:

In this question, we are required to convert the height of a person (which is given in feet) to nanometers.

1 foot is approximately equal to 304.8 million nanometers. To find the height in nanometers for a person who is six feet tall, we would simply multiply 6 by 304.8 million.

- Option 1 and 2 do not multiply correctly due to the use of 106 (which is a million). They are considerably smaller than the correct calculated value.

- Option 3 is approximately correct as 183 x 107 equals to 1830 million which is close to the result of 6 x 304.8 million. This small difference might be due to the rounding off.

- Option 4 overestimates the height of the person by a large margin since 234 x 107 equals to 2340 million, which is considerably more than the correct answer.

Therefore, option 3 is the closest approximation to the correct answer. It`s a matter of conversion and multiplication.