Quantitative Aptitude Ques 2427
Question: If $ x+y=12 $ and $ xy=27, $ then $ x^{3}+y^{3} $ equal to
Options:
A) 752
B) 754
C) 756
D) 780
Show Answer
Answer:
Correct Answer: C
Solution:
- $ x+y=12 $ and $ xy=27 $ $ x^{3}+y^{3}={{(x+y)}^{3}}-3xy,(x+y) $ $ ={{(12)}^{3}}-3\times 27,(12) $ $ =1728-81\times 12 $ $ =1728-972=756 $
BETA
