2012 RRB Ahmedabad

Question 42

$$ \frac{8.73 \times 8.73 \times 8.73 + 4.27 \times 4.27 \times 4.27}{8.73 \times 8.73 -8.73 \times 4.27 + 4.27 \times 4.27} $$ is equal to ----

Solution

($$ a ^ {3} + b ^ {3}$$) / ($$ a ^ {2} - ab + b ^ {2} $$) = a + b 

Substituting 8.73 for a and 4.27 for b, we get the answer


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