Q. If A:B = 5:14, B:C = 21:11, then A:B:C is:

22:15:42

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5:35:11

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15:42:22

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5:7:11

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None of these

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Solution

The correct option is C 15:42:22
Take the LCM OF B in A:B, B:C
A:B = 5 $\times$ 3:14 $\times$ 3=15:42
B:C = 21 $\times$ 2:11 $\times$ 2
A:B:C = 15:42:22

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Similar questions

If $Δ ∣ ∣ ∣ ∣ \begin{matrix} a_{11} & a_{12} & a_{13} a_{21} & a_{22} & a_{23} a_{31} & a_{32} & a_{33} \end{matrix} ∣ ∣ ∣ ∣$ and $A_{i j}$ is cofactor of $a_{i j}$ , then value of $Δ$ is given by

a) $a_{11} A_{31} + a_{12} A_{32} + a_{13} A_{33}$
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d) $a_{11} A_{11} + a_{21} A_{21} + a_{31} A_{31}$

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Q. If A:B = 5:14, B:C = 21:11, then A:B:C is:

The correct option is C 15:42:22Take the LCM OF B in A:B, B:C A:B = 5×3:14×3=15:42 B:C = 21×2:11×2 A:B:C = 15:42:22

The correct option is C 15:42:22
Take the LCM OF B in A:B, B:C
A:B = 5 $\times$ 3:14 $\times$ 3=15:42
B:C = 21 $\times$ 2:11 $\times$ 2
A:B:C = 15:42:22