If $a:b = 2:3$ and we let $a = 2k$, then $b$ equals

If $a:b = 2:3$ and we let $a = 2k$, then $b$ equals
  1. $3k$
  2. $2k$
  3. $5k$
  4. $\dfrac{k}{3}$

Solution

k-method substitution.

Asked in: MH-SSC-9

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