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Q6&7

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Asked by hrittik12d 25th October 2018, 1:40 PM
Answered by Expert
Answer:
Option d is correct.
 
 
 
Using Pythagoras theorem;
 
d2 = 2a2 + a2 
 
     = 3a
straight d equals square root of 3 straight a

space space equals space 2 straight r to the power of minus

square root of 3 straight a space equals space straight r to the power of minus space plus space straight r to the power of plus space plus space space straight r to the power of minus space plus space straight r to the power of plus space

space space space space space space space space space equals space 2 space straight r to the power of minus space plus space 2 straight r to the power of plus

space square root of 3 cross times 2 straight r to the power of minus equals 2 space open parentheses straight r to the power of minus space plus space straight r to the power of plus close parentheses

square root of 3 space equals space fraction numerator straight r to the power of plus over denominator space straight r to the power of minus end fraction plus 1

fraction numerator straight r to the power of plus over denominator space straight r to the power of minus end fraction space equals square root of 3 minus 1

space space space space space space equals space 0.732
The ratio of the radius is 0.732
 
Answered by Expert 26th October 2018, 2:06 PM
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