1.

यदि `x(x+y+z)=20,y(x+y+z)=30,` और `z(x+y+z)=50`, तो `2(x+y+z)` का मान क्या होगा?A. 20B. 10C. 15D. 18

Answer» Correct Answer - A
Put `(x+y+z)=10`
`x=2`
`y=3`
`z=5`
`x(x+y+z)=20`
`2(10)=20`
Similarly other will satisfied so value of `2(x+y+z)`
`implies 2(10)=20`


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