How can the height of a person who is six feet tall be expressed (approximately) in nanometres?
Reviewed by Dalvoy
UPSC Civil Services preparation
- A$183 x 10^6$ nanometres
- B$234 x 10^6$ nanometres
- C$183 x 10^7$ nanometresCorrect
- D$234 x 10^7$ nanometres
Explanation
To find the height in nanometres, follow these simple conversion steps:
1. One foot is approximately 30.48 centimetres. Therefore, 6 feet is equal to 6 multiplied by 30.48, which is approximately 183 centimetres.
2. One centimetre is equal to 10 million nanometres, which is 10 raised to the power of 7.
3. By multiplying 183 centimetres by 10 raised to the power of 7 nanometres, we get 183 x 10 to the power of 7 nanometres.
This matches option C.
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