C-11-Q069mediumsingle_mcq

If $\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}$ , then $\dfrac{x+y+z}{2+3+5}$ equals—

a $\dfrac{x}{2}$
b $\dfrac{1}{10}$
c $\dfrac{x+y+z}{x}$
d $0$

ব্যাখ্যা

By the sum rule, $\dfrac{x+y+z}{2+3+5}$ equals the common ratio $\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{5}$ . Substituting $x=2k,\ y=3k,\ z=5k$ gives $\dfrac{10k}{10}=k=\dfrac{x}{2}$ .

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Algebraic Ratio and Proportion — সব প্রশ্ন দেখুন (180টি) →

If $\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}$ , then $\dfrac{x+y+z}{2+3+5}$ equals—

\dfrac{x}{2}

\dfrac{1}{10}

\dfrac{x+y+z}{x}

0

ব্যাখ্যা

By the sum rule, $\dfrac{x+y+z}{2+3+5}$ equals the common ratio $\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{5}$ . Substituting $x=2k,\ y=3k,\ z=5k$ gives $\dfrac{10k}{10}=k=\dfrac{x}{2}$ .

If x2=y3=z5\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}2x​=3y​=5z​, then x+y+z2+3+5\dfrac{x+y+z}{2+3+5}2+3+5x+y+z​ equals—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

If x2=y3=z5\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}2x​=3y​=5z​, then x+y+z2+3+5\dfrac{x+y+z}{2+3+5}2+3+5x+y+z​ equals—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

If $\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}$ , then $\dfrac{x+y+z}{2+3+5}$ equals—

If $\dfrac{x}{2} = \dfrac{y}{3} = \dfrac{z}{5}$ , then $\dfrac{x+y+z}{2+3+5}$ equals—